Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
cap phan » cac phan, cao phan, cap han
phan van » pham van, thanh van, luan van
tu sach » su sach, te sach, tu cach
hoi cap » hoi dap, hoi cac, hoi cau
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: ((tu sach) OR (thu sach)) hoc tap, nghien cuu mo hoc dan khoa hoc xa hoi cap phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) hoc tap, nghien cuu mo hoc dan khoa hoc xa hoi cap phan van".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) hoc tap, nghien cuu mo hoc dan khoa hoc xa hoi cap phan van*.