Perhaps you should try some spelling variations:
chat huu » pham huu
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu va ((chao xu) or (chat huu)) va hanh vai ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu va ((chao xu) OR (chat huu)) va hanh vai ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va ((chao xu) or (chat huu)) va hanh vai ((cuu tre) or (cua tre))*.