Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoach hoi » hoc hoi, hoach ha, sach hoi
hoc nganh » hoc nhanh
nhan tain » nhan dan, nhan tao, han tai
tu hoach » thu hoach, tu hach, quy hoach
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
hoi tap » hoi dap, hoc tap, hoi tai
mo hoc » mon hoc, co hoc
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 hoach hoi tap, nghien cuu mo hoc nganh khoa hoc ma hoi va ((nhan tain) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hoach hoi tap, nghien cuu mo hoc nganh khoa hoc ma hoi va ((nhan tain) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: tu hoach hoi tap, nghien cuu mo hoc nganh khoa hoc ma hoi va ((nhan tain) or (nhan tai))*.