Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
thu sach » tu sach, thuat sach, thuoc sach
va doanh » van doanh, va danh, hoa doanh
van cuu » van cau, van chu, van cu
cac lao » ca lao, cac loai, cac giao
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
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: ((thu sach) or (thu san)) ky nang x hoi. hieu va cac lao ((va doanh) OR (vay doanh)) van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu san)) ky nang x hoi. hieu va cac lao ((va doanh) OR (vay doanh)) van cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thu san)) ky nang x hoi. hieu va cac lao ((va doanh) OR (vay doanh)) van cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu san)) ky nang x hoi. hieu va cac lao ((va doanh) OR (vay doanh)) van cuu tre*.