Perhaps you should try some spelling variations:
quan nhung » qua nhung, cua nhung, quang hung
luan chung » luan chinh
hanh mang » nhanh mang, hanh trang, nhanh lang
doc hieu » toc thieu, hoc thieu
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: ((doc hieu) or (hoc hien)) xanh - hanh mang ((luan chung) or (quan nhung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - hanh mang ((luan chung) OR (quan nhung)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - hanh mang ((luan chung) or (quan nhung)) cong tac toan cau*.