Perhaps you should try some spelling variations:
sach dong » sach dung, sach song, sach rong
danh khoa » doanh khoa, anh khoa, danh hoa
dong tac » cong tac, dong tai, dong bac
hoc danh » hoc dan, hoc anh, hoc hanh
hoi luan » hoa luan, hoc luan, khoa luan
te sach » toc sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc mai » hoc ma, hoc dai, hoc may
hoc bai » hoc dai, hoc giai
van van » van ban, tan van, san van

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