Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
nam tuc » nam thuc, nam truc, nam tu
xa hanh » xa thanh, xa khanh, va hanh
cuu tre » cua tre, cau tren
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. ((hieu va) OR (lieu va)) nam tuc xa hanh vi ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. ((hieu va) OR (lieu va)) nam tuc xa hanh vi ((cuu tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu va) OR (lieu va)) nam tuc xa hanh vi ((cuu tre) or (cau treo))*".