Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
phan van » pham van, thanh van, luan van
su sach » so sach, vu sach
doi tap » doi tac, doi tai, doi tan
doi dap » hoi dap, doi dau, do dap
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
va phan » van phan, va phat, va phap
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 ((doi tap) OR (doi dap)), nghien cuu mot hoc khanh hoa hoc xa hoi va phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((doi tap) OR (doi dap)), nghien cuu mot hoc khanh hoa hoc xa hoi va phan van".
• Adding a wildcard symbol may retrieve word variants: su sach ((doi tap) OR (doi dap)), nghien cuu mot hoc khanh hoa hoc xa hoi va phan van*.