Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
phat tan » nhat tan, pham tan, phan tan
van hoc » van hoa
pha tan » pha tap, pha ban, pha san
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: thu sach hoc tap, nghien cuu van hoc khanh hoa hoc xa hoi va ((phat tan) OR (pha tan))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien cuu van hoc khanh hoa hoc xa hoi va ((phat tan) OR (pha tan))".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu van hoc khanh hoa hoc xa hoi va ((phat tan) OR (pha tan))*.