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
nhan van » nhan dan, nhan va, phan van
va nhan » van nhan, ca nhan, va phan

You may be able to get more results by adjusting your search query.

• 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) OR (hoc ma)) hoi va nhan van~".
• Adding a wildcard symbol may retrieve word variants: toc cach thuc tap, nghien cuu cong hoc hang khoa ((hoc xa) OR (hoc ma)) hoi va nhan van*.