Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hang cong » dang cong, hang nong, bang cong
ho chieu » hoc thieu, doi chieu, mot chieu
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat cau » phan cau, pha cau, phap cau

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 (theo chieu)) tinh - canh ((tranh va) or (trinh va)) hang cong tac phat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) tinh - canh ((tranh va) OR (trinh va)) hang cong tac phat cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) tinh - canh ((tranh va) or (trinh va)) hang cong tac phat cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) tinh - canh ((tranh va) or (trinh va)) hang cong tac phat cau*.