Perhaps you should try some spelling variations:
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
cong hoc » dong hoc, cong hoa, cong coc
phan dau » phan tu, hang dau
tu mach » tu cach, tu manh, tu hach
o thanh » _ thanh, son thanh, tro thanh
nhan va » nhan tai, nhan dan, nhan tao
dong o » dong co, duong o, dong ho
hoc xa » hoc ma
xa hoa » xa khoa, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu dong o thanh cong hoc xa hoa dan ((nhan va) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu dong o thanh cong hoc xa hoa dan ((nhan va) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu dong o thanh cong hoc xa hoa dan ((nhan va) or (phan dau))*.