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

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu cac thoi tap, nghien cac cong hoa nganh khoa hoc ((xua hai) OR (qua hai)) van thanh ha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu cac thoi tap, nghien cac cong hoa nganh khoa hoc ((xua hai) OR (qua hai)) van thanh ha".
• Adding a wildcard symbol may retrieve word variants: vu cac thoi tap, nghien cac cong hoa nganh khoa hoc ((xua hai) OR (qua hai)) van thanh ha*.