Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh hoi » thanh hoai, thanh hoa, thanh hai
nang xa » nang x, lang xa, nang ma
van cao » van dao, van bao, van cau
van hao » van dao, van ha, van bao
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky

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

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