Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hoa, thanh hai
hang tai » hang va, dung tai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet

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 ky ((nang cao) or (((sang tao) OR (hang tai)))) roi. hieu ve pham duc va thanh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang cao) OR (((sang tao) OR (hang tai)))) roi. hieu ve pham duc va thanh hoi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang cao) or (((sang tao) OR (hang tai)))) roi. hieu ve pham duc va thanh hoi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang cao) or (((sang tao) OR (hang tai)))) roi. hieu ve pham duc va thanh hoi cua tre*.