Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
ky lang » ky dang, ky tang, tay lang
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san

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 lang) OR (ky nang)) xa hoi. hieu van cac xuc ((van ban) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky nang)) xa hoi. hieu van cac xuc ((van ban) OR (ban hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) OR (ky nang)) xa hoi. hieu van cac xuc ((van ban) or (ban hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) OR (ky nang)) xa hoi. hieu van cac xuc ((van ban) or (ban hanh)) vai cua tre*.