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