Perhaps you should try some spelling variations:
nganh khoa » nganh khong, doanh khoa, anh khoa
nganh hoa » thanh hoa, khanh hoa, danh hoa
tuan phan » luan phan, toan phan, tuan pham
mach hoc » cach hoc, dich hoc, anh hoc
tan tuan » tran tuan, than tuan, van tuan
tu mach » tu cach, tu manh, tu hach
hai tan » hai van, hai quan
mo hoc » mon hoc, co hoc
ma hai » ta hai, va hai, xa hai

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 mo hoc ((nganh khoa) or (nganh hoa)) hoc ma hai tan tuan phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu mo hoc ((nganh khoa) OR (nganh hoa)) hoc ma hai tan tuan phan.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu mo hoc ((nganh khoa) or (nganh hoa)) hoc ma hai tan tuan phan*.