How to set top align for tabular inside tabular?

I propose another code, without multirow: as the picture is the only cell in its column,a simple \smash{\raisebox… will do the trick. I've added a variant, without vertical rules, and the thicker horizontal rules of booktabs, which looks nicer in my opinion:

\documentclass[12pt]{article}

% For removing number order at section header.
\makeatletter
\def\@seccntformat#1{%
  \expandafter\ifx\csname c@#1\endcsname\c@section\else
  \csname the#1\endcsname\quad
  \fi}
\makeatother

% For font-size header
\usepackage{sectsty}
\sectionfont{\fontsize{12}{15}\selectfont}

% For top-align and left-align size.
\usepackage[utf8]{inputenc}
\usepackage{geometry}
 \geometry{
 a4paper,
 total={170mm,257mm},
 left=25mm,
 top=20mm,
 }

\usepackage{array, booktabs}
\usepackage[x11names]{xcolor}

% Define tab length.
 \newcommand\tab[1][1cm]{\hspace*{#1}}


\title{\textbf{\large{CURRICULUM VITAE}}}
\author{\textbf{\textit{Do Nhu Vy}}}
\date{July 2016}

\usepackage{natbib}
\usepackage{graphicx}

\begin{document}

\maketitle

\section{BASIC INFORMATION}
\setlength\extrarowheight{2pt}
\begin{tabular}{|l|>{\itshape}l|l|}
\hline
Full name & Do Nhu Vy & \raisebox{\dimexpr-\height +1pt}[0pt][0pt]{\includegraphics[scale=0.5]{sendak}} \\
Date of birth & 26\textsuperscript{th} August 1987 & \\
Hometown/Residence & Cat Que -- Hoai Duc -- Hanoi, Vietnam & \\
Marital status & Single & \\
Email & [email protected] & \\
Skype & dnv2006 & \\
Mobile number & +84 90 323 7207 & \\
\hline
\end{tabular}
\vspace{1cm}

\section{BASIC INFORMATION}
\setlength\extrarowheight{3pt}
\begin{tabular}{@{\,}>{\textcolor{CadetBlue3}{\textbullet}\enspace}l>{\itshape}ll@{}}
\toprule
Full name & Do Nhu Vy & \raisebox{-\height}[0pt][0pt]{\includegraphics[scale=0.5]{sendak}} \\
Date of birth & 26\textsuperscript{th} August 1987 & \\
Hometown/Residence & Cat Que -- Hoai Duc -- Hanoi, Vietnam & \\
Marital status & Single & \\
Email & [email protected] & \\
Skype & dnv2006 & \\
Mobile number & +84 90 323 7207 & \\
\bottomrule
\end{tabular}

\end{document}