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