Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, nhung don
doi chieu » doc hieu, doi chi, ho chieu
hang cong » dang cong, hang nong, bang cong
san than » sang than, san thanh, ban than
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: doi chieu sang - ((canh tranh) or (hanh trinh)) va ((nhung cong) OR (hang cong)) san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((canh tranh) OR (hanh trinh)) va ((nhung cong) OR (hang cong)) san than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((canh tranh) or (hanh trinh)) va ((nhung cong) OR (hang cong)) san than cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((canh tranh) or (hanh trinh)) va ((nhung cong) OR (hang cong)) san than cao*.