Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va doanh » van doanh, vay doanh, va danh
ban muon » ban huong, ban tuong, ban moi
ban quan » van quan
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
cac bao » cach bao, cac bai, cac ban
bao va » bao ve, tao va, ban va
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: ((thuoc sach) or (thu san)) ky nang x hoi. hieu va cac bao va doanh ((ban muon) OR (ban quan)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thu san)) ky nang x hoi. hieu va cac bao va doanh ((ban muon) OR (ban quan)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thu san)) ky nang x hoi. hieu va cac bao va doanh ((ban muon) OR (ban quan)) tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thu san)) ky nang x hoi. hieu va cac bao va doanh ((ban muon) OR (ban quan)) tre*.