Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
thu sach » tu sach, thuat sach, thuoc sach
cam thu » nam thu, cac thu, ca thu
thu ban » thu hang
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (thu sach)) ky nang x hoi. lieu va cam thu ban thanh van ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (thu sach)) ky nang x hoi. lieu va cam thu ban thanh van ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (thu sach)) ky nang x hoi. lieu va cam thu ban thanh van ((cua tre) or (cua triet))*.