Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
xuc van » duc van, luc van, xuc ban
luu van » cuu van, luan van, luu hanh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cam ((xuc van) or (luu van)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cam ((xuc van) OR (luu van)) hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cam ((xuc van) or (luu van)) hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cam ((xuc van) or (luu van)) hanh tai cua tre*.