Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
vu khanh » vu thanh, van khanh, duy khanh
thuc ban » thuoc ban, thuc dan, thu ban
thanh vi » hanh vi, thanh va, thanh ve
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau treo
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khanh) or (tu sach)) ky nang xa hoi. lieu va am thuc ban thanh vi ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khanh) OR (tu sach)) ky nang xa hoi. lieu va am thuc ban thanh vi ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khanh) or (tu sach)) ky nang xa hoi. lieu va am thuc ban thanh vi ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: ((vu khanh) or (tu sach)) ky nang xa hoi. lieu va am thuc ban thanh vi ((cuu tre) OR (cau tren))*.