Perhaps you should try some spelling variations:
khoan thanh » hoan thanh, phan thanh, hoang thanh
sach hoi » sach doi, sach moi, cach thoi
ho khoan » coc khoan, hoc khoa, hoi khoa
cong coc » cong cuoc, cong cac, cong uoc
dan luan » doanh luan, dung luan, tang luan
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
cong co » dong co, cong cu, cong so
hoi dan » hoa dan, hoc dan, hoi dap
cuu ho » cuu hoc, cuu hoi, cuu pho

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 hoi tap, nghien cuu ho khoan thanh ((cong coc) or (cong co)) xa hoi dan luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien cuu ho khoan thanh ((cong coc) OR (cong co)) xa hoi dan luan van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu ho khoan thanh ((cong coc) or (cong co)) xa hoi dan luan van*.