Perhaps you should try some spelling variations:
thanh tra » thanh toan, thanh hoa
thanh tri » thanh tai, chinh tri, thanh hai
nang hoc » nang doc, nang luc, dong hoc
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
hoc hai » hoc dai, hoc bai, hoc tai
cua tre » cua te, cuu tre, cua triet

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 ky nang hoc hai. ((hieu ve) or (hieu van)) cac xuc ban ((thanh tri) or (thanh tra)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang hoc hai. ((hieu ve) OR (hieu van)) cac xuc ban ((thanh tri) OR (thanh tra)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang hoc hai. ((hieu ve) or (hieu van)) cac xuc ban ((thanh tri) or (thanh tra)) cua tre*.