Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hoc thieu » hoc hien
nang cong » nang song, dang cong, bang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
va nang » van nang, da nang, cam nang

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)) xanh - ((hanh trinh) or (canh tranh)) va nang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - ((hanh trinh) OR (canh tranh)) va nang cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - ((hanh trinh) or (canh tranh)) va nang cong dan toan cao*.