Perhaps you should try some spelling variations:
nghiep cach » nghiep sach, nghiep cay, nghiep bac
nghien cac » nghien cuu, nghiep cay, nghiep bac
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoa nganh » hoc nganh, khoi nganh, hoa doanh
van thanh » ban thanh, van tuan
cac thoi » cac toi, cac hop, cac tro
khoa hoc » hoa hoc
cong hoa » dong hoa, dong hoc, hang hoa
thoi tap » toi tap, hoc tap, thoi dai
thanh ha » thanh hoa, thanh hai, nhanh ha
hoc xua » hoc cua, hoc xa, hoc lua
xua hai » qua hai, cua hai, xa hai
hai van » thai van, ha van, hai tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: va cac thoi tap, ((nghien cac) or (nghiep cach)) cong hoa nganh khoa hoc xua hai van thanh ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va cac thoi tap, ((nghien cac) OR (nghiep cach)) cong hoa nganh khoa hoc xua hai van thanh ha.
• Adding a wildcard symbol may retrieve word variants: va cac thoi tap, ((nghien cac) or (nghiep cach)) cong hoa nganh khoa hoc xua hai van thanh ha*.