Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu
trinh van » trinh han, trinh quan, trinh toan
van trong » van truong, vang trong, ban trong
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 hien) or (hoc thieu)) xanh - canh trinh van trong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (hoc thieu)) xanh - canh trinh van trong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (hoc thieu)) xanh - canh trinh van trong cong tac toan cau*.