Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
chinh va » chinh ta, chinh tai, hanh va
va trong » va truong, va thong, va tuong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - hanh chinh va trong cong tac than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh chinh va trong cong tac than cao*.