Perhaps you should try some spelling variations:
hoa thanh » hoan thanh, ha thanh, hoc thanh
sach doi » sach hoi, sach moi, sach dao
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan dan » phan dau, nhan tai
gian dan » gian lang
tu sach » thu sach, su sach, te sach
doi tai » hoi tai, dai tai, doi tac
pho hoc » phoi hoc, cho hoc, pho ho
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
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: tu sach doi tai, nghien cuu cong hoa thanh pho hoc mai hoi ca ((nhan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tai, nghien cuu cong hoa thanh pho hoc mai hoi ca ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: tu sach doi tai, nghien cuu cong hoa thanh pho hoc mai hoi ca ((nhan dan) or (gian dan))*.