Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham mat » ham mat, nham mat, pham ma
van hanh » van thanh, ban hanh, van anh
sach ty » sach tu, sach thu, xach tay
lang xa » lang ha, dang xay, lang van
va cham » va chat, va tham
mat van » ma van, mai van, hat van
cuu tre » cua tre, cau tren, cau treo

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: tu ((sach ty) OR (sach y)) lang xa hoi. lieu va cham mat van hanh vi ((cuu tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) lang xa hoi. lieu va cham mat van hanh vi ((cuu tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) lang xa hoi. lieu va cham mat van hanh vi ((cuu tre) or (cua triet))*.