Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
te sach » toc sach
cam tuc » cam xuc, cam tu, nam thuc
hai cuc » tai cuc, hai cua, thai cua
cuc tre » duc tre, cua tre, cuu tre
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, me hoi
va cam » va cham, va cac, va cao

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 ((ma hoi) OR (ma hoa)). hieu va cam tuc ((ban thanh) or (gia thanh)) hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((ban thanh) OR (gia thanh)) hai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((ban thanh) or (gia thanh)) hai cuc tre".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((ban thanh) or (gia thanh)) hai cuc tre*.