Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chong cong » cong cong, thong cong, cuong cong
hoc thieu » toc thieu, hoc hien
tac chong » cac chuong, cac cong, cac chung
cong tac » cong ty
cong tan » cong san, cong thanh, cong ty
tan chan » dan chan, ban chan, can chan
chan cao » chan cho, chat cao, chay cao

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 (theo chieu)) xanh - thanh cong tac chong cong tan chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) xanh - thanh cong tac chong cong tan chan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) xanh - thanh cong tac chong cong tan chan cao*.