Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
van doanh » toan doanh, van dong, van thanh
dau treo » dau tren, cau treo, dau theo
phan dau » phan tu, hang dau
thu sach » tu sach, thuat sach, thuoc sach
thi nang » thi cong, thi hanh
pham duy » pham duc
ve pham » vi pham, v pham, ve phan
duy van » duy vat, dung van
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ki nang » ky nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thu sach)) ((thi nang) OR (ki nang)) x hoi. hieu ve pham duy van doanh phan dau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ((thi nang) OR (ki nang)) x hoi. hieu ve pham duy van doanh phan dau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thu sach)) ((thi nang) OR (ki nang)) x hoi. hieu ve pham duy van doanh phan dau treo".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ((thi nang) OR (ki nang)) x hoi. hieu ve pham duy van doanh phan dau treo*.