Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trong hung » trong nhung, trong phung, trong rung
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh xquang, anh quan, tinh quang
hung cong » nhung cong, hung cuong, phung cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
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: doi chieu sach - ((anh quang) OR (nhanh quang)) trong hung cong tan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((anh quang) OR (nhanh quang)) trong hung cong tan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((anh quang) OR (nhanh quang)) trong hung cong tan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((anh quang) OR (nhanh quang)) trong hung cong tan ((toan cau) or (toan cao))*.