Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
te sach » toc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cau tre » cau tren, cau treo, cuu tre
cau tra » ca tra, cau ra, cau truc
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: te sach y nang xa hoi. hieu van pham duc va hanh di ((cau tre) or (cau tra))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu van pham duc va hanh di ((cau tre) OR (cau tra)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu van pham duc va hanh di ((cau tre) or (cau tra))*.