Perhaps you should try some spelling variations:
thanh dan » thanh san, thanh dat, thanh dam
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ve cam duc van ((thanh dan) OR (thanh van)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ve cam duc van ((thanh dan) OR (thanh van)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve cam duc van ((thanh dan) OR (thanh van)) ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ve cam duc van ((thanh dan) OR (thanh van)) ((cua tre) or (cuu tre))*.