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
phap dan » phap day, phap han, phap san
phap van » pham van, phan van, phap han
tu mach » tu cach, tu manh, tu hach
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 dan) OR (phap van))~.
• 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 dan) OR (phap van))".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu cong cac nganh hoa hoc ma hoi va ((phap dan) OR (phap van))*.