Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
sach toi » sach doi, sach hoi, sach moi
su sach » so sach, vu sach
toi tap » toi gap, toan tap, tong tap
mot hoc » mon hoc, mot goc, bot hoc
va luan » vay luan, van luan, va quan
mo hoc » mon hoc, co hoc
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 toi tap, nghien cuu ((mot hoc) OR (mo hoc)) khanh hoa hoc xa hoi va luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach toi tap, nghien cuu ((mot hoc) OR (mo hoc)) khanh hoa hoc xa hoi va luan van".
• Adding a wildcard symbol may retrieve word variants: su sach toi tap, nghien cuu ((mot hoc) OR (mo hoc)) khanh hoa hoc xa hoi va luan van*.