Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nang mai » nang ma, nang tai, lang mai
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ly nang mai hoi. hieu va cao tuc ((ban thanh) or (gia thanh)) hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang mai hoi. hieu va cao tuc ((ban thanh) OR (gia thanh)) hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ly nang mai hoi. hieu va cao tuc ((ban thanh) or (gia thanh)) hai cuu tre*.