Perhaps you should try some spelling variations:
thien van » thi van
nhan luc » nang luc
hieu van » hieu va, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
luc va » duc va, tuc va, loc va
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 van) or (thien van)) nhan luc va hanh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu van) OR (thien van)) nhan luc va hanh vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu van) or (thien van)) nhan luc va hanh vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((hieu van) or (thien van)) nhan luc va hanh vai ((cua tre) OR (cuu tre))*.