Perhaps you should try some spelling variations:
thanh chong » thanh chuong, thanh cong, nhanh chong
hoan thanh » hoang thanh, ban thanh, van thanh
chong dich » luong dich, hang dich
cong hoan » cong hoa, dong hoa, cong san
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
nhan dan » phan dau, nhan tai
gian dan » gian lang
su sach » so sach, vu sach
dich xa » dich va, dinh xa, dich can
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoc tap, nghien cuu cong hoan thanh chong dich xa hoi ca ((nhan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien cuu cong hoan thanh chong dich xa hoi ca ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu cong hoan thanh chong dich xa hoi ca ((nhan dan) or (gian dan))*.