Perhaps you should try some spelling variations:
danh dau » lanh dao, hang dau, danh tu
danh dai » danh di, danh sai, vanh dai
thu sac » thu sach, thu san, thu xac
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang xa hoi. ((hieu ve) or (hieu va)) cau truc va ((danh dai) or (danh dau)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cau truc va ((danh dai) OR (danh dau)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang xa hoi. ((hieu ve) or (hieu va)) cau truc va ((danh dai) or (danh dau)) cua tre*.