Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cach thuc » anh thuc, cac thu
hang khoa » dung khoa
toc cach » hoc cach, toc sach, truoc cach
thuc tap » tuc tap, thuc thai, thuc vat
cong hoc » dong hoc, cong hoa, cong coc
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
van phan » van phong, van thanh, luan phan
va phan » va phat, va phap, hoa phan
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: toc cach thuc tap, nghien thu cong hoc hang khoa hoc xa hoi ((va phan) or (van phan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc cach thuc tap, nghien thu cong hoc hang khoa hoc xa hoi ((va phan) OR (van phan)) van.
• Adding a wildcard symbol may retrieve word variants: toc cach thuc tap, nghien thu cong hoc hang khoa hoc xa hoi ((va phan) or (van phan)) van*.