Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nhanh khong » nhanh chong, nganh khong, nhan khong
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoc nhanh » hoc nganh, hoc phan
nhan dan » phan dau, gian dan, nhan tai
thuoc va » thuc va, thuoc ma, thuong va
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
thoi tap » toi tap, hoc tap, thoi dai
tu cach » tu cac
va nhan » van nhan, ca nhan, va phan
su cach » su sach, su cac, cuu cach
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cach) or (tu cach)) thoi tap, nghien cac cong hoc nhanh khong thuoc va hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cach) OR (tu cach)) thoi tap, nghien cac cong hoc nhanh khong thuoc va hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((su cach) or (tu cach)) thoi tap, nghien cac cong hoc nhanh khong thuoc va hoi va nhan dan*.