Perhaps you should try some spelling variations:
khong thuoc » hong phuoc, dong thuoc, khoa thuoc
khang thuoc » dang thuoc, hanh thuoc, khau thuoc
hoc nhanh » hoc nganh, hoc phan
sach hoc » cach hoc, sach hoi, mach hoc
te sach » toc sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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 hoc tap, nghien cuu mon hoc nhanh ((khong thuoc) or (khang thuoc)) xa hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu mon hoc nhanh ((khong thuoc) OR (khang thuoc)) xa hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu mon hoc nhanh ((khong thuoc) or (khang thuoc)) xa hoi va nhan va*.