Perhaps you should try some spelling variations:
hieu cao » chieu cao, hieu ca, kieu cao
danh dai » danh dau, danh di, danh sai
hieu cac » hieu luc, hieu va, hieu van
trung va » truong va, trang va, trung ha
dai cuu » dai cua, dai huu
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo

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 nang xa hoi. ((hieu cao) or (hieu cac)) chat ((truc va) OR (trung va)) danh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu cao) OR (hieu cac)) chat ((truc va) OR (trung va)) danh dai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu cao) or (hieu cac)) chat ((truc va) OR (trung va)) danh dai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu cao) or (hieu cac)) chat ((truc va) OR (trung va)) danh dai cuu tre*.