Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
cua chua » sua chua, cua chu, cua nhua
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
cua cua » ca cua, qua cua, cua cha
y nang » ky nang, ly nang, v nang
me hoi » le hoi
tuc va » thuc va, truc va, tuc xa

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 y nang ((me hoi) or (ma hoa)). hieu va cac tuc va doanh ((cua cua) OR (cua chua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((me hoi) OR (ma hoa)). hieu va cac tuc va doanh ((cua cua) OR (cua chua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((me hoi) or (ma hoa)). hieu va cac tuc va doanh ((cua cua) OR (cua chua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((me hoi) or (ma hoa)). hieu va cac tuc va doanh ((cua cua) OR (cua chua)) tre*.