Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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 lang xa hoi. ((hieu ve) or (hieu va)) pham duc va ((danh vi) OR (danh di)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. ((hieu ve) OR (hieu va)) pham duc va ((danh vi) OR (danh di)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. ((hieu ve) or (hieu va)) pham duc va ((danh vi) OR (danh di)) cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. ((hieu ve) or (hieu va)) pham duc va ((danh vi) OR (danh di)) cua tu*.