Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
manh trung » manh tung, thanh trung, manh hung
doi chieu » doc hieu, doi chi, ho chieu
chua nang » chuc nang, chua xang, kha nang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
ki nang » ky nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - manh trung ((chua nang) or (ki nang)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - manh trung ((chua nang) OR (ki nang)) cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - manh trung ((chua nang) or (ki nang)) cong san toan ban*.