Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van tuan » van quan, anh tuan
nang xa » nang x, lang xa, nang ma
ban sac » ban sach
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
sac ky » sai ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sac ky) or (cac ky)) nang xa hoi. hieu van ban sac ((van anh) or (van tuan)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sac ky) OR (cac ky)) nang xa hoi. hieu van ban sac ((van anh) OR (van tuan)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat ((sac ky) or (cac ky)) nang xa hoi. hieu van ban sac ((van anh) or (van tuan)) vi cua tre*.