Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xanh di » danh di, vanh dai, xanh tai
danh vi » hanh vi, dinh vi, danh di
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cua tu » cua tuc, cua su, cua cu

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) or (hieu qua)) cam duc va ((danh vi) or (xanh di)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. ((hieu ve) OR (hieu qua)) cam duc va ((danh vi) OR (xanh di)) cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. ((hieu ve) or (hieu qua)) cam duc va ((danh vi) or (xanh di)) cua tu*.