Perhaps you should try some spelling variations:
doanh vang » doanh van, doanh sang, doanh quang
tham thuc » nham thuc, pham thuc, tam thuc
vay doanh » van doanh, ly doanh, voi doanh
cham tuc » nham thuc, pham thuc, cham soc
vang cua » mang cua, hang cua, tang cua
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may 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) OR (ly nang)) xa hoi. hieu ve ((cham tuc) or (tham thuc)) vay doanh vang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly nang)) xa hoi. hieu ve ((cham tuc) OR (tham thuc)) vay doanh vang cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ly nang)) xa hoi. hieu ve ((cham tuc) or (tham thuc)) vay doanh vang cua tre*".