Perhaps you should try some spelling variations:
hoc thieu » hoc hien
hanh dong » anh dong, ha dong
dong phan » dung phan, cong phan, dong chan
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan
van tan » van tuan, van ban, van tai

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

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