Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
phan chong » phan cong, phan hong, phap chong
thu luong » thu huong, thu tuong, phu luong
luong hoc » duong hoc, tuong hoc, luong hoa
chong hoc » chung hoc, chong doc, thong hoc
hoc phan » hoc dan, hoc pho
cau luan » cu luan, dau luan, lau luan
tu sach » thu sach, su sach, te sach
hoi tap » hoc tap, hoi tai, hai tap
hoc cau » hoc cao, hoc cac, hoc can
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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) or (hoi dap)), nghien thu luong hoc phan chong hoc xa hoc cau luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((hoi tap) OR (hoi dap)), nghien thu luong hoc phan chong hoc xa hoc cau luan van.
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) or (hoi dap)), nghien thu luong hoc phan chong hoc xa hoc cau luan van*.