Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
vu khach » vu khanh, vu khac, vay khach
thuc ban » thuoc ban, thuc dan, thu ban
cam thuc » am thuc, nam thuc, cam thu
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cua triet, dua tren
cuu 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 (thu sach)) ky nang xa hoi. lieu va cam thuc ban thanh van ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (thu sach)) ky nang xa hoi. lieu va cam thuc ban thanh van ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) or (thu sach)) ky nang xa hoi. lieu va cam thuc ban thanh van ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (thu sach)) ky nang xa hoi. lieu va cam thuc ban thanh van ((cua tre) OR (cuu tre))*.