Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
trong tan » trong quan, trong cac, cong tan
tung cao » truong cao, trung cap, quang cao
nung cao » nang cao, nhung cau, quang cao
trong ca » trong cac, trong nha
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: doi chieu xanh - thanh ((tung cao) OR (nung cao)) thuoc ((trong tan) or (trong ca)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh ((tung cao) OR (nung cao)) thuoc ((trong tan) OR (trong ca)) than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((tung cao) OR (nung cao)) thuoc ((trong tan) or (trong ca)) than cap".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((tung cao) OR (nung cao)) thuoc ((trong tan) or (trong ca)) than cap*.