Perhaps you should try some spelling variations:
than quang » tran quang, phan quang, thac quang
chi sach » chinh sach, chieu sach, co sach
qua than » qua thanh, qua phan, qua tan
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi
anh qua » anh quan, danh qua, hanh qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - anh qua than quang ((cong tap) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - anh qua than quang ((cong tap) OR (cong tan)) toan cau*.