Perhaps you should try some spelling variations:
hang khoa » dung khoa
loc tinh » hoi tinh, hoa tinh, dac tinh
tinh hoc » sinh hoc, tin hoc, hinh hoc
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
nhan tai » van tai, toan tai
hang tai » hang va, dung tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
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: loc tinh hoc tap, nghien cuu mot hoc hang khoa hoc xa hoi va ((nhan tai) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: loc tinh hoc tap, nghien cuu mot hoc hang khoa hoc xa hoi va ((nhan tai) OR (hang tai)).
• Adding a wildcard symbol may retrieve word variants: loc tinh hoc tap, nghien cuu mot hoc hang khoa hoc xa hoi va ((nhan tai) or (hang tai))*.