Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nghien huu » nghien cuu, nguyen huu, nhiem huu
mach hoc » cach hoc, dich hoc, anh hoc
chong do » chong doc, cuong do, chong co
nhan van » nhan dan, nhan va, phan van
tu mach » tu cach, tu manh, tu hach
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
do xa » doi xa, do va, o xa

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 tap, nghien huu ((mot goc) or (mon hoc)) nhanh chong do xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien huu ((mot goc) OR (mon hoc)) nhanh chong do xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien huu ((mot goc) or (mon hoc)) nhanh chong do xa hoi va nhan van*.