Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
va doanh » van doanh, va danh, hoa doanh
co sach » bo sach, cuon sach, hoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ty nang x ho. hieu ve pham duc ((va doanh) OR (vay doanh)) van ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ty nang x ho. hieu ve pham duc ((va doanh) OR (vay doanh)) van ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ty nang x ho. hieu ve pham duc ((va doanh) OR (vay doanh)) van ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: co sach ty nang x ho. hieu ve pham duc ((va doanh) OR (vay doanh)) van ((cua te) or (cua tu))*.