Perhaps you should try some spelling variations:
danh dai » danh dau, danh di, danh sai
trang va » tran van, hang va
hieu cao » chieu cao, hieu cac, hieu ca
trung va » truong va, trung ha, trung tam
cao kha » cao khai, cao khoa, co kha
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
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: thuoc ((sach ky) OR (sach y)) nang xa hoi. hieu cao kha ((trung va) or (trang va)) danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sach y)) nang xa hoi. hieu cao kha ((trung va) OR (trang va)) danh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) OR (sach y)) nang xa hoi. hieu cao kha ((trung va) or (trang va)) danh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) OR (sach y)) nang xa hoi. hieu cao kha ((trung va) or (trang va)) danh dai cua tre*.