Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
cach thuc » cac thu
anh thuc » am thuc, dan thuc, anh tu
cong hoc » dong hoc, cong hoa, cong coc
hoc bang » hoc bong, hoc tang, hoc dan
bang hoa » hang hoa, bang hoc, bong hoa
nhan dan » phan dau, gian dan, nhan tai
va nhan » van nhan, ca nhan, va 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: hoc ((cach thuc) or (anh thuc)) tap, nghien cua cong hoc bang hoa hoc xa hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((cach thuc) OR (anh thuc)) tap, nghien cua cong hoc bang hoa hoc xa hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: hoc ((cach thuc) or (anh thuc)) tap, nghien cua cong hoc bang hoa hoc xa hoi va nhan dan*.