Perhaps you should try some spelling variations:
thuat cach » thuat sach, thuat canh, thuat mach
nghien huu » nghien cuu, nguyen huu, nhiem huu
nhan khoa » nha khoa, khuan khoa, toan khoa
cach hoc » cach thuc, cach thoi, dich hoc
huu toan » huu tuan, cuu toan, huy toan
toan hoc » toan khoa, van hoc, hoa hoc
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
khoa hoc » hoa hoc
va nhan » van nhan, va phan, va nha
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: thuat cach hoc tap, nghien huu toan hoc nhan khoa hoc xa hoi ((va nhan) or (ca nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat cach hoc tap, nghien huu toan hoc nhan khoa hoc xa hoi ((va nhan) OR (ca nhan)) van.
• Adding a wildcard symbol may retrieve word variants: thuat cach hoc tap, nghien huu toan hoc nhan khoa hoc xa hoi ((va nhan) or (ca nhan)) van*.