Perhaps you should try some spelling variations:
thanh nhan » thanh phan, thanh san, thanh toan
cach thoi » cach thuc, cach noi
nhan khoa » nha khoa, khuan khoa, toan khoa
hoi thanh » hoc thanh, hai thanh, hoa thanh
cac thoi » cac toi, cac hop, cac tro
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
khoa hoc » hoa hoc
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((cach thoi) or (cac thoi)) tap, nghien cuu tong hoc nhan khoa hoc xa hoi thanh nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((cach thoi) OR (cac thoi)) tap, nghien cuu tong hoc nhan khoa hoc xa hoi thanh nhan va.
• Adding a wildcard symbol may retrieve word variants: te ((cach thoi) or (cac thoi)) tap, nghien cuu tong hoc nhan khoa hoc xa hoi thanh nhan va*.