Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
ha thanh » va thanh, pham thanh, phan thanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cac tac » cac toc, cac bac, cac dac
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
tac ha » bac ha, tac da, tac xa

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 ((ma hoi) OR (ma hoa)). lieu va cac tac ha thanh doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (ma hoa)). lieu va cac tac ha thanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) OR (ma hoa)). lieu va cac tac ha thanh doi cua tre*.