Perhaps you should try some spelling variations:
chua tre » chua tri, cua tre, chua trieu
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
va chua » vua chua, ca chua, va chu
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc 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) or (toc sach)) ky nang ma hoi. ((hieu ve) or (hieu van)) cac xuc va thanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang ma hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh va chua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang ma hoi. ((hieu ve) or (hieu van)) cac xuc va thanh va chua tre*.