Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
pham thuc » phap thuc, pham chuc, nham thuc
danh vai » danh sai, danh va, dang van
vu sach » vu bach, su sach, vu khach
cuu tre » cua tre, cau tren, cau treo
sach ta » sach tai, sach xa, sach ha
thuc va » thuc vat, thuc dan, thuc day
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
va nghi » ca nghi, va nghien, va nguoi
ta hang » va hang, ty hang, te hang
ca tren » cau tren, cu tren, la tren

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 ta hang va nghi. hieu ve pham thuc va ((danh vai) or (doanh van)) ((cuu tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ta hang va nghi. hieu ve pham thuc va ((danh vai) OR (doanh van)) ((cuu tre) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: vu sach ta hang va nghi. hieu ve pham thuc va ((danh vai) or (doanh van)) ((cuu tre) or (ca tren))*.