Perhaps you should try some spelling variations:
luan phan » luan van, luan hoan
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
luc hang » duc thang, duc hoang, phuc hang
luc sang » lam sang, luc canh, duy sang
khoa hoc » hoa hoc
hai luan » thai luan, khai luan, hai quan
phan van » pham van, thanh van, luan van
tu sach » thu sach, su sach, te sach
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: tu sach hoc tap, nghien cuu dong ((luc hang) OR (luc sang)) khoa hoc xa hai luan phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu dong ((luc hang) OR (luc sang)) khoa hoc xa hai luan phan van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong ((luc hang) OR (luc sang)) khoa hoc xa hai luan phan van*.