Perhaps you should try some spelling variations:
quang trach » quang thanh, quang tran
quang tranh » quang thanh, quang tran, quan thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - nhanh ((quang tranh) OR (quang trach)) nhung ((cong dan) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - nhanh ((quang tranh) OR (quang trach)) nhung ((cong dan) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - nhanh ((quang tranh) OR (quang trach)) nhung ((cong dan) or (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - nhanh ((quang tranh) OR (quang trach)) nhung ((cong dan) or (cong tac)) toan cao*.