Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hanh noi » hanh vi, nang noi
cong coc » cong cuoc, cong cac, cong co
coc toan » ngoc toan, coc khoan, quoc toan
toan hoa » toan khoa, toan hoat, toan hoc
gian lan » gian lang, gian dan, giang van
va gian » va gianh, van gian, va giai
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 ((hanh noi) OR (ha noi)) tap, nghien cua cong coc toan hoa hoc xa hoi va gian lan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((hanh noi) OR (ha noi)) tap, nghien cua cong coc toan hoa hoc xa hoi va gian lan".
• Adding a wildcard symbol may retrieve word variants: tu ((hanh noi) OR (ha noi)) tap, nghien cua cong coc toan hoa hoc xa hoi va gian lan*.