Perhaps you should try some spelling variations:
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
anh vai » anh va, anh bai, anh van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve cac

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

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