Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van han » van hanh, van phan, van nhan
tai cua » thai cua, tai cuc, tri cua
va cau » van cau, va cac, va cao
va dau » va dao
va han » va phan, va hanh, va hang
cua su » qua su

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. lieu ((va cau) or (va dau)) xuc ((va han) or (van han)) tai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. lieu ((va cau) OR (va dau)) xuc ((va han) OR (van han)) tai cua su.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. lieu ((va cau) or (va dau)) xuc ((va han) or (van han)) tai cua su*.