Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
doanh van » doan van, doanh va, doanh ban
cham tuc » pham thuc, tham thuc, cham soc
xa doanh » va doanh, hoa doanh, van doanh
hieu van » hieu va, thien van, lieu va
van cua » vang cua, ban cua, dan cua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
cua tre » cua te, cuu tre, cua triet
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 van)) ((cham tuc) or (nham thuc)) xa doanh van cua tre~.
• 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 tuc) OR (nham thuc)) xa doanh van cua tre*.
• 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 tuc) or (nham thuc)) xa doanh van cua tre*".