Perhaps you should try some spelling variations:
ban thanh » ban hang
vu khach » vu khanh, vu khac, vay khach
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cam thu » nam thu, cac thu, ca thu
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao

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 (tu sach)) ky nang xa hoi. lieu va cam thu ((ban thanh) OR (ban hanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (tu sach)) ky nang xa hoi. lieu va cam thu ((ban thanh) OR (ban hanh)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) or (tu sach)) ky nang xa hoi. lieu va cam thu ((ban thanh) OR (ban hanh)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (tu sach)) ky nang xa hoi. lieu va cam thu ((ban thanh) OR (ban hanh)) vai cuu tre*.