Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tran vanp » tan van, tran vinh, tran manh
dung cong » dung trong
hoc viet » hoc hien
tran van » luan van
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

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