Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
thanh phan » thanh pho, thanh san, thanh toan
sach rong » sach song, sach huong, sach dung
khong hoc » khung hoc, thong hoc, khong thuoc
rong tan » trong tan, cong tan, nong tan
dong hoc » dong co, dong luc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
mon hoc » toan hoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach rong tan, nghien cuu ((mon hoc) or (dong hoc)) nganh khong hoc xa hoi va thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach rong tan, nghien cuu ((mon hoc) OR (dong hoc)) nganh khong hoc xa hoi va thanh phan.
• Adding a wildcard symbol may retrieve word variants: tu sach rong tan, nghien cuu ((mon hoc) or (dong hoc)) nganh khong hoc xa hoi va thanh phan*.