Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
luc nhanh » luc nganh, luc canh, luc nhat
chong hoc » chung hoc, chong doc, thong hoc
danh toan » manh toan, anh toan, dan toan
mach hoc » cach hoc, dich hoc, anh hoc
luc nhan » luc nhat, cu nhan, tue nhan
hoi danh » hop danh, hoi dan, hoc danh
toan tai » toan tap, doanh tai, toan ban
tu mach » tu cach, tu manh, tu hach
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 mach hoc tap, nghien huu tung ((luc nhanh) or (luc nhan)) chong hoc xa hoi danh toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien huu tung ((luc nhanh) OR (luc nhan)) chong hoc xa hoi danh toan tai.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien huu tung ((luc nhanh) or (luc nhan)) chong hoc xa hoi danh toan tai*.