Perhaps you should try some spelling variations:
chat xuc » chat huu, chao xu, chat cua
kho tang » cao tang
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, ky trong
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau
ca cua » co cua

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 tang) OR (kho tang)) ma hoi. hieu va ((cam xuc) or (chat xuc)) va dan ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (kho tang)) ma hoi. hieu va ((cam xuc) OR (chat xuc)) va dan ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) OR (kho tang)) ma hoi. hieu va ((cam xuc) or (chat xuc)) va dan ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) OR (kho tang)) ma hoi. hieu va ((cam xuc) or (chat xuc)) va dan ca cua tre*.