Perhaps you should try some spelling variations:
hoc khuan » hoc phan, hoc khoa, hoc quan
khuan hoa » khuan khoa, chuan hoa, nhuan khoa
hinh hoc » sinh hoc, tin hoc, benh hoc
hang tai » hang va, dung tai
tu hinh » tu minh, tu hanh, su hinh
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu hinh hoc tap, nghien cuu mon hoc khuan hoa hoc xa hoi va ((nhan va) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hinh hoc tap, nghien cuu mon hoc khuan hoa hoc xa hoi va ((nhan va) OR (hang tai)).
• Adding a wildcard symbol may retrieve word variants: tu hinh hoc tap, nghien cuu mon hoc khuan hoa hoc xa hoi va ((nhan va) or (hang tai))*.