Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tang mai » tang ma, tang tai, lang mai
hanh dao » lanh dao, thanh dat, thanh dam
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
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: thu sach ky tang mai hoi. hieu ve cham ((xuc va) or (thuc vat)) hanh dao ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang mai hoi. hieu ve cham ((xuc va) OR (thuc vat)) hanh dao ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang mai hoi. hieu ve cham ((xuc va) or (thuc vat)) hanh dao ((cua tre) OR (cuu tre))*".