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
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
ve pham » vi pham, v pham, ve phan
sach ta » sach tai, sach xa, sach ha
hieu ve » hieu va, hieu van
ta tang » ta trang, tay tang, ha tang
cuu tre » cua tre, cau tren, cau treo
ha hoi » hoa hoi, ha noi, va 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 tang ((ha hoi) or (xa 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 tang ((ha hoi) OR (xa hoi)). hieu ve pham thuc va ((danh vai) OR (doanh van)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ta tang ((ha hoi) or (xa hoi)). hieu ve pham thuc va ((danh vai) or (doanh van)) cuu tre*.