Perhaps you should try some spelling variations:
thuong thuat » thuong thuyet, thuong thuc, trong thuat
hanh thuong » khanh thuong, thanh thuong, hang thuong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thuat bang » thuat ban, thuat mang, thuat nang
bang cong » dang cong, bang song, hang cong
van van » van ban, tan van, san van
van vat » van chat, nhan vat

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)) - hanh thuong thuat bang cong ((van van) OR (van vat)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh thuong thuat bang cong ((van van) OR (van vat)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - hanh thuong thuat bang cong ((van van) OR (van vat)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh thuong thuat bang cong ((van van) OR (van vat)) ban*.