Perhaps you should try some spelling variations:
doanh cua » doanh luan
van doanh » toan doanh, van dong, van thanh
van chat » cao chat
cua cua » cua chua, ca cua, qua cua
van cam » van nam, van lam, van cau
tu sach » thu sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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) or (su sach)) ty nang ma hoi. hieu ((van cam) or (van chat)) lo van doanh cua cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ma hoi. hieu ((van cam) OR (van chat)) lo van doanh cua cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang ma hoi. hieu ((van cam) or (van chat)) lo van doanh cua cua tre*.