Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
hoc danh » hoc dan, hoc hanh, hoc nganh
khoa hoc » hoa hoc
hoi luan » hoa luan, hoc luan, khoa luan
luan san » luan van, luan hoan, luan phan
te sach » toc sach
doi tac » dong tac
cuu mon » cuu mo, cuu mot, cuu cong
hoc anh » hoc nganh, hoc nhanh, ngoc anh
san van » tan van, luan van, tran van
ma hoi » mai hoi, xa hoi, ma hoa

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 doi tac, nghien cuu mon ((hoc danh) or (hoc anh)) khoa hoc ma hoi luan san van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi tac, nghien cuu mon ((hoc danh) OR (hoc anh)) khoa hoc ma hoi luan san van.
• Adding a wildcard symbol may retrieve word variants: te sach doi tac, nghien cuu mon ((hoc danh) or (hoc anh)) khoa hoc ma hoi luan san van*.