Perhaps you should try some spelling variations:
hanh dao » lanh dao, thanh dat, thanh dam
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
dao cua » dai cua, day cua, dan cua
cua tre » cua te, cuu tre, cua triet
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
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 cai ky tang 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 cai ky tang xa hoi. ((hieu va) OR (hieu qua)) cam luc va hanh dao cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cai ky tang xa hoi. ((hieu va) OR (hieu qua)) cam luc va hanh dao cua tre*.