Perhaps you should try some spelling variations:
nghien chua » nghien cuu, nghiep cua, nghiem thuat
thanh chong » thanh chuong, thanh cong, nhanh chong
chong dich » luong dich, hang dich
chua dong » cua dong, ha dong, huy dong
hoa thanh » hoan thanh, ha thanh, hoc thanh
sach hoc » cach hoc, sach hoi, mach hoc
dong hoa » dong hoc, dong co
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 chua dong hoa 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 chua dong hoa thanh chong dich xa hoi ca ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien chua dong hoa thanh chong dich xa hoi ca ((nhan dan) or (gian dan))*.