Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thuan » trung tuan, trong thuan, trung thanh
thuan trong » thuat trong, nhuan trong, than trong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cong tap » cuong tap, cong tac, cong tan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 trung thuan trong cong tap ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh trung thuan trong cong tap ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - thanh trung thuan trong cong tap ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - thanh trung thuan trong cong tap ((toan cau) OR (toan ban))*.