Perhaps you should try some spelling variations:
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
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
va nhan » ca 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: toc cach thuc tap, nghien cuu cong hoc hang khoa hoc xa hoi ((va nhan) OR (van nhan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc cach thuc tap, nghien cuu cong hoc hang khoa hoc xa hoi ((va nhan) OR (van nhan)) van".
• Adding a wildcard symbol may retrieve word variants: toc cach thuc tap, nghien cuu cong hoc hang khoa hoc xa hoi ((va nhan) OR (van nhan)) van*.