Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va tham » van tham, va cham, va thanh
xuc va » tuc va, luc va, xac va
tai va » thai va, mai va, tri va
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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 ty nang x hoi. hieu ((va tham) or (van thanh)) ((xuc va) or (duc va)) nhan tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((va tham) OR (van thanh)) ((xuc va) OR (duc va)) nhan tai va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((va tham) or (van thanh)) ((xuc va) or (duc va)) nhan tai va thiet*.