Perhaps you should try some spelling variations:
ve triet » va trien, su triet
doanh va » doan va, doanh tai, doanh cua
cam truc » cau truc, nam truc, lam truoc
hieu ve » hieu van
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
danh va » hanh va, anh va, dan va
nang xa » nang x, lang xa, nang ma
tu sach » thu sach, su sach, te sach
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 ve) or (hieu va)) cam truc va ((danh va) OR (doanh va)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu ve) OR (hieu va)) cam truc va ((danh va) OR (doanh va)) ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu ve) or (hieu va)) cam truc va ((danh va) OR (doanh va)) ve triet*".