Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va cao » va cac, va dao, va bao
va co » vo co

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 y) or (sac ky)) nang xa hoi. hieu ((va cao) OR (va co)) duc va hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach y) OR (sac ky)) nang xa hoi. hieu ((va cao) OR (va co)) duc va hanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach y) or (sac ky)) nang xa hoi. hieu ((va cao) OR (va co)) duc va hanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach y) or (sac ky)) nang xa hoi. hieu ((va cao) OR (va co)) duc va hanh doi cua tre*.