Perhaps you should try some spelling variations:
goc thanh » ngoc thanh, hoc thanh, doc thanh
sach hoc » cach hoc, sach hoi, mach hoc
cong hoa » dong hoa, dong hoc, hang hoa
phan dan » phan dang, phan dau, nhan dan
gian dan » gian lang
te sach » toc sach
cuu mot » cua mot, cuu mo, huu mot

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoc tap, nghien cuu mot goc thanh cong hoa xa hoi va ((phan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu mot goc thanh cong hoa xa hoi va ((phan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu mot goc thanh cong hoa xa hoi va ((phan dan) or (gian dan))*.