Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham xuc » tham nuoc, tham thuc, pham duc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vi va » vai va, vu va, bi va

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