Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
anh tang » anh bang, anh dang, anh nang
va trong » va truong, va thong, va tuong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
va tong » va thong, va tuong, va cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu tinh - anh tang ((va tong) or (va trong)) cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu tinh - anh tang ((va tong) OR (va trong)) cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu tinh - anh tang ((va tong) or (va trong)) cong tan toan ban*.