Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh cong » nhanh chong, thanh cong
hoc nganh » hoc nhanh
cong hoc » dong hoc, cong hoa, cong coc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
hai van » thai van, ha van, hai tan
hoc xa » hoc ma
xa hai » xa thai, xua hai, 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: ((te sach) or (thuoc sach)) doi tap, nghien thu cong hoc nganh cong hoc xa hai van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) doi tap, nghien thu cong hoc nganh cong hoc xa hai van nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) doi tap, nghien thu cong hoc nganh cong hoc xa hai van nhan dan*.