Perhaps you should try some spelling variations:
cac nganh » hoc nganh
nganh hoa » thanh hoa, khanh hoa, danh hoa
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong cac » cuong cac, cong tac, cong cau
tu mach » tu cach, tu manh, tu hach
va phap » ban phap
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu cong cac nganh hoa hoc ma hoi ((va phap) OR (va phat)) dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu cong cac nganh hoa hoc ma hoi ((va phap) OR (va phat)) dan".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu cong cac nganh hoa hoc ma hoi ((va phap) OR (va phat)) dan*.