Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
han thanh » phan thanh, hoan thanh, huan thanh
van thiet » va thiet, dan thiet, can thiet
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
vu cham » va cham, vu kham, tu cham
va tham » van tham, va cham, va thanh
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu nang xa hoi. hieu ((vu cham) or (va tham)) xuc va han thanh van thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang xa hoi. hieu ((vu cham) OR (va tham)) xuc va han thanh van thiet.
• Adding a wildcard symbol may retrieve word variants: su sach tu nang xa hoi. hieu ((vu cham) or (va tham)) xuc va han thanh van thiet*.