Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
mach hoc » cach hoc, dich hoc, anh hoc
phan van » pham van, thanh van, tran van
tu mach » tu cach, tu manh, tu hach
van hoc » van hoa
ma hoi » mai hoi, xa hoi, ma hoa
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu van hoc khanh hoa hoc ma hoi va ((phan van) OR (luan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu van hoc khanh hoa hoc ma hoi va ((phan van) OR (luan van))".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu van hoc khanh hoa hoc ma hoi va ((phan van) OR (luan van))*.