Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
va thanh » gia thanh, va tinh, le thanh
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van lam » van nam
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. hieu van lam thuc ((va thanh) or (ban thanh)) tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu van lam thuc ((va thanh) OR (ban thanh)) tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu van lam thuc ((va thanh) or (ban thanh)) tai cuu tre*.