Perhaps you should try some spelling variations:
quan tran » quang tran, quan tren, xuan tran
cuong tap » luong tap, cong tac, luong tai
chi sach » chinh sach, chieu sach, co sach
anh quan » anh tuan, ban quan, anh nhan
tong tap » tuong tac, trong tan, cong tac
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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 quan tran quang ((tong tap) or (cuong tap)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - anh quan tran quang ((tong tap) OR (cuong tap)) toan cau*.