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