Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cac tuc » cac toc, cac tac, cac nuoc
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
y hang » ly hang, ty hang, yu hang
cac tu » cac thu, cach tu, cac du

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y hang xa hoi. hieu ve ((cac tuc) OR (cac tu)) va hanh tai ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y hang xa hoi. hieu ve ((cac tuc) OR (cac tu)) va hanh tai ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: su sach y hang xa hoi. hieu ve ((cac tuc) OR (cac tu)) va hanh tai ((cua tre) or (cuu tre))*.