Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nhanh khong » nhanh chong, nganh khong, nhan khong
hoc nhanh » hoc nganh, hoc phan
mach hoc » cach hoc, dich hoc, bac hoc
thuoc ma » hoc ma, duoc ma
nhan dan » phan dau, gian dan, nhan tai
anh hoc » sinh hoc, benh hoc, hinh hoc
van hoc » van hoa
ma hoi » mai hoi, xa hoi, ma hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

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