Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
trinh vat » trinh van, trinh luat, sinh vat
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
cong san » cong tac
san hang » san chang, ban hang, van hang
hang tai » hang va, dung tai

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 sang - canh ((tranh va) or (trinh vat)) thong cong san hang tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - canh ((tranh va) OR (trinh vat)) thong cong san hang tai.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - canh ((tranh va) or (trinh vat)) thong cong san hang tai*.