Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
ban manh » ban hanh, van manh, ban mach
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang

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: tu sach ((ky lang) OR (ky tang)) xa hoi. ((hieu ve) OR (hieu va)) cam duc ban manh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) OR (ky tang)) xa hoi. ((hieu ve) or (hieu va)) cam duc ban manh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) OR (ky tang)) xa hoi. ((hieu ve) or (hieu va)) cam duc ban manh hai cua tre*.