Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
goc doanh » hoa doanh, voi doanh, von doanh
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
phan van » pham van, thanh van, luan van
cuu mot » cua mot, cuu mo, huu mot
vo phan » co phan, va phan, so phan
hoa vo » hoa co

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) or (cach thoi)) tap, nghien cuu mot goc doanh hoa hoc ma hoa vo phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach hoc) OR (cach thoi)) tap, nghien cuu mot goc doanh hoa hoc ma hoa vo phan van.
• Adding a wildcard symbol may retrieve word variants: su ((sach hoc) or (cach thoi)) tap, nghien cuu mot goc doanh hoa hoc ma hoa vo phan van*.