Perhaps you should try some spelling variations:
chong hoc » chung hoc, chong doc, thuong hoc
thong hoc » thuong hoc, tuong hoc, thong hoa
hoc nhanh » hoc nganh, hoc phan
van tuan » van quan, van ban, anh tuan
sach hoi » sach doi, sach moi, cach thoi
tuan san » luan san, tan san, thanh san
mon hoc » toan hoc, dong hoc
cuu mon » cuu mo, cuu mot, cuu cong
mai hoi » mai khoi, dai hoi, lai hoi
hoi van » hoi va, hoi dan, hai van
hoi tap » hoi dap, hoc tap, hoi tai
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoi tap, nghien cuu mon hoc nhanh ((chong hoc) or (thong hoc)) mai hoi van tuan san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, nghien cuu mon hoc nhanh ((chong hoc) OR (thong hoc)) mai hoi van tuan san.
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien cuu mon hoc nhanh ((chong hoc) or (thong hoc)) mai hoi van tuan san*.