Perhaps you should try some spelling variations:
hang doi » hang di, hang loi, huong doi
su sach » vu sach
tuc van » thuc van, truc van, tuc va
dao tuc » dao duc
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (so sach)) ty nang xa hoi. lieu va dao tuc van ((hanh vi) or (hang doi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty nang xa hoi. lieu va dao tuc van ((hanh vi) OR (hang doi)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ty nang xa hoi. lieu va dao tuc van ((hanh vi) or (hang doi)) cuu tre*".