Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh vai » hanh vi, hanh va, hanh tai
chat xuc » chat huu, cam xuc, chao xu
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ve chat » va chat, van chat
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 ty ((nang ma) or (nang x)) hoi. hieu ve chat xuc va hanh vai ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (nang x)) hoi. hieu ve chat xuc va hanh vai ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang ma) or (nang x)) hoi. hieu ve chat xuc va hanh vai ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (nang x)) hoi. hieu ve chat xuc va hanh vai ((cuu tre) OR (cau treo))*.