Perhaps you should try some spelling variations:
manh thinh » manh tinh, hanh chinh, hanh trinh
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
van hanh » van thanh, ban hanh, van anh
khoa hoc » hoa hoc
cong hoc » dong hoc, cong hoa, cong coc
canh toi » canh thin, hanh thoi, hanh tot
hai van » thai van, ha van, hai tan
hanh va » hang va, hanh vi
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((canh toi) or (manh thinh)) tap, nghien cua cong hoc nganh khoa hoc xa hai van hanh va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((canh toi) OR (manh thinh)) tap, nghien cua cong hoc nganh khoa hoc xa hai van hanh va.
• Adding a wildcard symbol may retrieve word variants: thu ((canh toi) or (manh thinh)) tap, nghien cua cong hoc nganh khoa hoc xa hai van hanh va*.