Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
trong hung » trong nhung, trong phung, trong rung
doi chieu » doi chi, mot chieu, ho chieu
anh quang » anh xquang, anh quan, nhanh quang
hung cong » nhung cong, hung cuong, phung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
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: ((doi chieu) OR (doc hieu)) sach - anh quang trong hung cong tac ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) sach - anh quang trong hung cong tac ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sach - anh quang trong hung cong tac ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sach - anh quang trong hung cong tac ((toan cau) or (toan ban))*.