Perhaps you should try some spelling variations:
hoc thieu » hoc hien
phan dan » phan dang, phan dau, nhan dan
dan dung » van dung, tin dung, ap dung
dung ung » dung cong
ung dan » dung dan, tung dan, bung dan
dan van » dang van, doan van, dao van
van tan » van tuan, van ban, van tai
tan ca » tan cua, tang ca, dan ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) tinh - phan dan dung ung dan van tan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) tinh - phan dan dung ung dan van tan ca.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) tinh - phan dan dung ung dan van tan ca*.