Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
pham duy » pham duc
va thanh » gia thanh, va tinh, le thanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu pham » su pham, vi pham, vu kham
va chua » vua chua, ca chua, va chu
chua te » cua te, chua tu, chua xe

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu vu pham duy ((va thanh) or (ban thanh)) va chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu vu pham duy ((va thanh) OR (ban thanh)) va chua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu vu pham duy ((va thanh) or (ban thanh)) va chua te*.