Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cua tre » cuu tre, cua triet, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

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

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