Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
doanh van » doan van, doanh va, doanh ban
thuc dan » thuc hanh, hoc dan, thuc vat
tran van » luan van
danh vai » danh sai, danh va, dang van
tu sach » thu sach, su sach, te sach
sach ta » sach tai, sach xa, sach ha
ve tham » va tham, ve cham, vi tham
hieu ve » hieu va, hieu van
van hoc » van hoa
ta tran » tan tran, ta trang, ha tran
cuu tre » cua tre, cau tren, cau treo

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ta tran van hoc. hieu ve tham thuc dan ((danh vai) or (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ta tran van hoc. hieu ve tham thuc dan ((danh vai) OR (doanh van)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ta tran van hoc. hieu ve tham thuc dan ((danh vai) or (doanh van)) cuu tre*.