Perhaps you should try some spelling variations:
than thuc » thuan thuc, nhan thuc, toan thuc
danh vai » danh sai, danh va, doanh van
tran van » luan van
doanh va » doan va, doanh tai, doanh cua
bach ta » bach ha, cach ta, bach mai
cuu tre » cau tren, cau treo
ta tran » tan tran, ta trang, ha tran
thuc va » thuc vat, thuc dan, thuc day
vi than » vi thanh, vi phan, va than
hieu vi » hieu voi, hieu va, hieu ve
van hoi » van hoa, van hoc, van hoe
cua tre » cua te, cua triet, dua 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 bach ta tran van hoi. hieu vi than thuc va ((danh vai) or (doanh va)) ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ta tran van hoi. hieu vi than thuc va ((danh vai) OR (doanh va)) ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: vu bach ta tran van hoi. hieu vi than thuc va ((danh vai) or (doanh va)) ((cuu tre) or (cua tre))*.