Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
anh via » anh bia, anh viet, anh giao
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang x ho. ((hieu vien) OR (hieu hien)) cac xuc van ((anh via) or (anh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x ho. ((hieu vien) OR (hieu hien)) cac xuc van ((anh via) OR (anh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x ho. ((hieu vien) OR (hieu hien)) cac xuc van ((anh via) or (anh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x ho. ((hieu vien) OR (hieu hien)) cac xuc van ((anh via) or (anh va)) cua tre*.