Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
thuc va » thuc vat, thuc dan, thuc day
ve pham » vi pham, v pham, ve phan
sach ta » sach tai, sach xa, sach va
hieu ve » hieu va, hieu van
tang ha » lang ha, tang ma, trung ha
sach ha » sach nha, sach han, sach xa
cuu tre » cua tre, cau tren, cau treo
ha hoi » hoa hoi, ha noi, xa hoi

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