Perhaps you should try some spelling variations:
dam thuc » am thuc, dan thuc, nam thuc
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hieu va » lieu va, hieu qua
xa hanh » xa thanh, xa khanh, va hanh
cam tu » cam thu, nam tu, dam tu
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang x hoi. hieu va ((dam thuc) or (cam tu)) xa hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang x hoi. hieu va ((dam thuc) OR (cam tu)) xa hanh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. hieu va ((dam thuc) or (cam tu)) xa hanh vi cau treo*.