Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
sang mai » sang ma, sang tai, lang mai
hanh vai » hanh va, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va

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 ky sang mai hoi. hieu van cam xuc va ((hanh vai) or (hanh vi)) ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang mai hoi. hieu van cam xuc va ((hanh vai) OR (hanh vi)) ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang mai hoi. hieu van cam xuc va ((hanh vai) or (hanh vi)) ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang mai hoi. hieu van cam xuc va ((hanh vai) or (hanh vi)) ((cuu tre) OR (cau treo))*.