Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
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 va)) thong cong san hang tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - canh ((tranh va) OR (trinh va)) thong cong san hang tai".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - canh ((tranh va) OR (trinh va)) thong cong san hang tai*.