Perhaps you should try some spelling variations:
hieu cao » chieu cao, hieu ca, kieu cao
hieu cac » hieu luc, hieu va, hieu van
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
luc va » tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky dang xa hoi. ((hieu cao) OR (hieu cac)) chat ((luc va) or (duc va)) danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky dang xa hoi. ((hieu cao) OR (hieu cac)) chat ((luc va) OR (duc va)) danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky dang xa hoi. ((hieu cao) OR (hieu cac)) chat ((luc va) or (duc va)) danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky dang xa hoi. ((hieu cao) OR (hieu cac)) chat ((luc va) or (duc va)) danh vi cua tre*.