Perhaps you should try some spelling variations:
nhan khoa » nha khoa, khuan khoa, toan khoa
luan luan » quan luan, luan luong, luan hoan
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
luc nhan » luc nhat, cu nhan, tue nhan
khoa hoc » hoa hoc
hai luan » thai luan, khai luan, hai quan
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach hoc) OR (sach hoi)) tap, nghien cuu dong luc nhan khoa hoc xa hai luan luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach hoc) OR (sach hoi)) tap, nghien cuu dong luc nhan khoa hoc xa hai luan luan van".
• Adding a wildcard symbol may retrieve word variants: te ((sach hoc) OR (sach hoi)) tap, nghien cuu dong luc nhan khoa hoc xa hai luan luan van*.