Perhaps you should try some spelling variations:
gian lang » gian dan
sach hoc » cach hoc, sach hoi, mach hoc
hoc dang » hoc dan, hoc bang, hoc tang
hoc dung » hoc ung, hoc dan, tac dung
khoa hoc » hoa hoc
cua gian » cua giang, cua giao, cua gia
su sach » so sach, vu sach
cuu mon » cuu mo, cuu mot, cuu cong
hoi cua » hoi chuc
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: su sach hoc tap, nghien cuu mon ((hoc dang) or (hoc dung)) khoa hoc xa hoi cua gian lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien cuu mon ((hoc dang) OR (hoc dung)) khoa hoc xa hoi cua gian lang.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu mon ((hoc dang) or (hoc dung)) khoa hoc xa hoi cua gian lang*.