Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
cam luoc » cam xuc, tom luoc, cam lo
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
ky cuu » ky cua, ky luu
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 ((y nang) or (ly nang)) ma hoi. hieu va cam luoc ((van thanh) OR (ban thanh)) ky cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) ma hoi. hieu va cam luoc ((van thanh) OR (ban thanh)) ky cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ly nang)) ma hoi. hieu va cam luoc ((van thanh) OR (ban thanh)) ky cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly nang)) ma hoi. hieu va cam luoc ((van thanh) OR (ban thanh)) ky cuu tre*.