Perhaps you should try some spelling variations:
hanh dao » lanh dao, thanh dat, thanh dam
dao cua » dai cua, day cua, dan cua
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
luc va » duc va, tuc va, loc va

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