Perhaps you should try some spelling variations:
danh dai » danh dau, danh di, danh sai
trung ha » trung hoc, trung tam, trung cap
trung va » truong va, trang va, trung tam
hieu cao » chieu cao, hieu cac, hieu ca
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet

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

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