Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh luan
hang cong » dang cong, hang nong, bang cong
theo chu » theo chieu, cho chu, chao chu
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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 chu)) xanh - hanh ((trinh cua) OR (trinh quan)) hang cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chu)) xanh - hanh ((trinh cua) OR (trinh quan)) hang cong tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (theo chu)) xanh - hanh ((trinh cua) OR (trinh quan)) hang cong tac than cap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chu)) xanh - hanh ((trinh cua) OR (trinh quan)) hang cong tac than cap*.