Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
dien cua » dieu cua, dien cuc, dien cu
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac duc » cac du, cac dac, cac nuoc
cao duc » dao duc, cao suc, giao duc
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky nang x ho. ((hieu ve) OR (hieu va)) ((cac duc) OR (cao duc)) va danh dien cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky nang x ho. ((hieu ve) OR (hieu va)) ((cac duc) or (cao duc)) va danh dien cua tre~".
• Adding a wildcard symbol may retrieve word variants: te cac ky nang x ho. ((hieu ve) OR (hieu va)) ((cac duc) or (cao duc)) va danh dien cua tre*.