Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh cua » doanh luan
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
van cam » van nam, van lam, van cau
cua cua » cua chua, ca cua, qua cua
cua tre » cua te, cuu tre, cua triet
cam lo » nam lo, cam ly, cam o
lo van » le van, vo van, so van

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 ((ty nang) OR (ty hang)) xa hoi. hieu van cam lo van doanh cua cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van cam lo van doanh cua cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van cam lo van doanh cua cua tre*.