Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van duoc » van duc, vat duoc, tan duoc
duoc tuc » duoc tu, duoc muc, duoc duoc
ky lang » ky dang, ky tang, tay lang
xa tinh » va tinh, ha tinh, ca tinh
tinh va » tich va, trinh van, trinh vat
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac
su xac » pu xac, su cac
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su xac)) ((ky lang) or (ky nang)) xa hoi. hieu van duoc tuc xa tinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ((ky lang) OR (ky nang)) xa hoi. hieu van duoc tuc xa tinh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ((ky lang) or (ky nang)) xa hoi. hieu van duoc tuc xa tinh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ((ky lang) or (ky nang)) xa hoi. hieu van duoc tuc xa tinh va cua tre*.