Perhaps you should try some spelling variations:
cong phap » chong phap, cong phan, cong pham
phap toan » phap hoan, phap luan, phap phan
cuu cong » cua cong, thu cong, cac cong
khoa hoc » hoa hoc
nhan van » nhan dan, nhan va, phan van
su sach » vu sach
so sach » so sanh, bo sach, co sach
va nhan » van nhan, ca nhan, va phan
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) OR (so sach)) hoc tap, nghien cuu cong phap toan khoa hoc xa hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) hoc tap, nghien cuu cong phap toan khoa hoc xa hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) hoc tap, nghien cuu cong phap toan khoa hoc xa hoi va nhan van*.