Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
doanh thai » doanh tai, doanh nhan, doanh thu
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
hieu ve » hieu va, hieu van
cam lo » nam lo, cam ly, cam o
ve cam » ve cham, ve cac, va cam
cua te » cua tu
lo va » lo van, lao va, ly va

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 (ky nang)) xa hoi. hieu ve cam lo va ((doanh thai) or (doanh thanh)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam lo va ((doanh thai) OR (doanh thanh)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam lo va ((doanh thai) or (doanh thanh)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam lo va ((doanh thai) or (doanh thanh)) cua te*.