Perhaps you should try some spelling variations:
tang nguoi » thang nguoi, tang nguon, nang nguoi
hoc thieu » toc thieu
tranh cai » tranh cac, trinh cai, tranh chap
nguoi dao » nguoi tay
cai tang » cai trang, cao tang, ca tang
dao toan » bao toan, dan toan, dao hoan
toan ban » van ban

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 (hoc hien)) xanh - canh tranh cai tang nguoi dao toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - canh tranh cai tang nguoi dao toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) xanh - canh tranh cai tang nguoi dao toan ban*.