Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
le trong » le trung, ly trong, le tang
cong ban » cong bang, cong san, cong tan
hang dau » hang va
hang tai » hang va, dung tai
tung le » tuong le, tang le, dung le

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) OR (chieu sach)) - thanh tung le trong cong ban ((hang dau) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh tung le trong cong ban ((hang dau) OR (hang tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - thanh tung le trong cong ban ((hang dau) or (hang tai))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - thanh tung le trong cong ban ((hang dau) or (hang tai))*.