Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
chat xuc » chat huu, cam xuc, chao xu
chat duc » chat doc, chet duoc, pham duc
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
hang co » hang cho, nang co, lang co
hang ca » hang va, nang cao, hang tai
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((hang co) OR (hang ca)) hoi. hieu van ((chat duc) OR (chat xuc)) va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((hang co) or (hang ca)) hoi. hieu van ((chat duc) OR (chat xuc)) va thanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach y ((hang co) or (hang ca)) hoi. hieu van ((chat duc) OR (chat xuc)) va thanh vi cua tre*.