Perhaps you should try some spelling variations:
thanh tung » thanh cong
hanh dong » anh dong, ha dong
doc hieu » toc thieu, hoc thieu
tung cap » trung cap, cung cap, thong cap
cap hanh » chap hanh, cap han, cac thanh
dong von » dung von, dong co, dong hoc
phan dau » hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) xanh - thanh tung cap hanh dong von ((phan tu) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - thanh tung cap hanh dong von ((phan tu) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - thanh tung cap hanh dong von ((phan tu) or (phan dau))*.