Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nganh thong » nganh cong, nhanh chong, anh thong
mach hoc » cach hoc, dich hoc, anh hoc
cua phan » cua nhan, cua phap, cua han
phan van » pham van, thanh van, luan van
tu mach » tu cach, tu manh, tu hach
cuu hoa » cuu khoa, cuu hoan, cau hoa
hoi cua » hoi chuc
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 mach hoc tap, nghien cuu hoa hoc ((nganh thong) OR (nganh khong)) hoc xa hoi cua phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu hoa hoc ((nganh thong) OR (nganh khong)) hoc xa hoi cua phan van".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu hoa hoc ((nganh thong) OR (nganh khong)) hoc xa hoi cua phan van*.