Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban banh » ban hanh, ban anh, ban danh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
duc ban » duc tan, duc van, dua ban
banh vi » hanh vi, ban vi, benh vi
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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 van lam duc ban banh vi ((cua tre) or (((cua te) OR (cua tu))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van lam duc ban banh vi ((cua tre) OR (((cua te) OR (cua tu)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu van lam duc ban banh vi ((cua tre) or (((cua te) OR (cua tu))))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van lam duc ban banh vi ((cua tre) or (((cua te) OR (cua tu))))*.