Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
dinh vai » dinh van, dinh vi, dinh va
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau treo
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
loc 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 dang xa hoi. hieu ve cam ((loc va) or (hoc va)) dinh vai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve cam ((loc va) OR (hoc va)) dinh vai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve cam ((loc va) or (hoc va)) dinh vai ((cuu tre) or (cau tren))*.