Perhaps you should try some spelling variations:
doanh van » doan van, doanh ban, doanh nhan
cham tuc » nham thuc, pham thuc, tham thuc
trang xa » trang va, trang ha, trang tai
trong xa » trong xay, trong ca, trong xu
qua cham » qua hai, qua cac, va cham
doanh va » doan va, doanh tai, doanh cua
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
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: vu sach ty ((trang xa) or (trong xa)) hoi. hieu qua cham tuc va ((doanh va) or (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((trang xa) OR (trong xa)) hoi. hieu qua cham tuc va ((doanh va) OR (doanh van)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((trang xa) or (trong xa)) hoi. hieu qua cham tuc va ((doanh va) or (doanh van)) cuu tre*.