Perhaps you should try some spelling variations:
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
hoa toan » hoa tan, hop toan, hoa than
khoa hoc » hoa hoc
te mach » ke mach, te sach, tim mach
hoc dai » hoc dan
dai hoi » dai hoc, dai hai, dai moi
va nhan » van nhan, ca nhan, va nha
va phan » van phan, va phat, va phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: te mach hoc tap, nghien cuu cong hoa toan khoa hoc dai hoi ((va nhan) OR (va phan)) va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te mach hoc tap, nghien cuu cong hoa toan khoa hoc dai hoi ((va nhan) OR (va phan)) va".
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cuu cong hoa toan khoa hoc dai hoi ((va nhan) OR (va phan)) va*.