Perhaps you should try some spelling variations:
chau phan » cau phan, chau nhan, chau phong
khoa chau » khoai chau, khoa phau, khoa cham
phan dan » phan dang, phan dau, nhan dan
sach dao » lanh dao
khoa hoc » hoa hoc
san khoa » toan khoa, hang khoa, da khoa
cuu toan » cua toan, huu toan, cuu thanh
cuu hoan » luu hoang, cuu van, cuu khoa
hoc san » hoc dan, toc san, hoc can
xa khoa » da khoa, bia khoa, tai khoa
dao tap » dao tao, dao tay, dao gap
tu sach » thu sach, su sach, te sach
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 dao tap, nghien ((cuu toan) OR (cuu hoan)) hoc san khoa hoc xa khoa chau phan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach dao tap, nghien ((cuu toan) OR (cuu hoan)) hoc san khoa hoc xa khoa chau phan dan".
• Adding a wildcard symbol may retrieve word variants: tu sach dao tap, nghien ((cuu toan) OR (cuu hoan)) hoc san khoa hoc xa khoa chau phan dan*.