Perhaps you should try some spelling variations:
sach thoi » cach thoi, sach hoi, sach tham
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
tuong hoc » truong hoc, tuong ho, duong hoc
thoi tap » toi tap, hoc tap, thoi dai
so sach » so sanh, bo sach, co sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi ban » hoi dan, hoi bai, doi ban
phap » phan, pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thoi tap, nghien cuu mon hoc nganh ((khong hoc) or (tuong hoc)) xa hoi ban phap day~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thoi tap, nghien cuu mon hoc nganh ((khong hoc) OR (tuong hoc)) xa hoi ban phap day.
• Adding a wildcard symbol may retrieve word variants: so sach thoi tap, nghien cuu mon hoc nganh ((khong hoc) or (tuong hoc)) xa hoi ban phap day*.