Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
cua cua » cua chua, ca cua, qua cua
cua chu » sua chua
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 chu)) 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 chu)) 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 chu)) tre*.