Perhaps you should try some spelling variations:
cho thanh » cho phan, tro thanh, cuu thanh
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong cho » dung cho, dong co, dong hoc
cong hoc » dong hoc, cong hoa, cong coc
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
su mach » su sach
hoc xa » hoc ma
ha van » hoa van, nha van, va van
xa ha » xa hoa, xa hai, la ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: su mach hoc tap, nghien cuu dong cho thanh cong hoc xa ha van ((nhan dan) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su mach hoc tap, nghien cuu dong cho thanh cong hoc xa ha van ((nhan dan) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu dong cho thanh cong hoc xa ha van ((nhan dan) OR (phan dau))*.