Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, doanh van
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
va danh » va dinh, va dan, va hanh
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
soc va » hoc va, loc va, doc va
cua te » cua tu

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 ve) or (hieu van)) cham soc va danh vai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu ve) OR (hieu van)) cham soc va danh vai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu ve) or (hieu van)) cham soc va danh vai ((cua tre) OR (cua te))*".