Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
sang tao » hang tai
hoc sac » hoc sach, hoc cac, hoc mac
sang ma » tang ma, nang ma, mang may
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, vuc van
cuc tre » duc tre, cua tre, cuu tre
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky ((sang ma) or (sang tao)) hoi. hieu qua cam xuc van doanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky ((sang ma) OR (sang tao)) hoi. hieu qua cam xuc van doanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: hoc sac ky ((sang ma) or (sang tao)) hoi. hieu qua cam xuc van doanh tai cuc tre*.