Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh va, dinh tai
sach ky » sac ky, sach ty, sach kem
dinh vi » dinh ve, dinh viet, dinh tri
cam loc » cam lo
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
loc va » hoc va, luc va
ve cam » ve cham, ve cac, va cam

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 ky) OR (sach y)) lang xa hoi. hieu ve cam loc va ((dinh vai) or (dinh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang xa hoi. hieu ve cam loc va ((dinh vai) OR (dinh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) lang xa hoi. hieu ve cam loc va ((dinh vai) or (dinh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) lang xa hoi. hieu ve cam loc va ((dinh vai) or (dinh vi)) cuu tre*.