Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
thoi tai » thoi dai, hoi tai, phoi tai
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
su cach » su sach, tu cach, su cac
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hai van » thai van, ha van, hai tan
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: su cach thoi tai, nghien cuu mot hoc nganh hoa hoc xa hai van ((nhan dan) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cach thoi tai, nghien cuu mot hoc nganh hoa hoc xa hai van ((nhan dan) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: su cach thoi tai, nghien cuu mot hoc nganh hoa hoc xa hai van ((nhan dan) OR (phan dau))*.