Perhaps you should try some spelling variations:
doanh thai » doanh tai, doanh thanh, doanh nhan
cham cuu » cap cuu, chat cua
thu sach » tu sach, thuat sach, thuoc sach
ty doanh » ly doanh, te doanh, tri doanh
thai cua » than cua, tai cuc, tri cua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
cuu ty » cuu tu, cuu y, cua ty
x hoi » xa hoi, o hoi, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ((x hoi) OR (x ho)). ((hieu ve) or (hieu va)) cham cuu ty doanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((x hoi) OR (x ho)). ((hieu ve) OR (hieu va)) cham cuu ty doanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((x hoi) OR (x ho)). ((hieu ve) or (hieu va)) cham cuu ty doanh thai cua tre*".