Perhaps you should try some spelling variations:
hoc thieu » hoc hien
phan cong » thanh cong
cong dung » cuong dung, cong dong, cong luong
dung dung » ung dung, dung ung, dung dong
dung dat » dung va, dung tai
dat van » dao van, dat va, dam van
van dan » van ban, ban dan, van dao

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 cong dung dung dat van dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) tinh - phan cong dung dung dat van dan ca.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) tinh - phan cong dung dung dat van dan ca*.