Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat huu » pham huu
vu chat » va chat, ve chat, du chat
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
tu cach » tu cac
hieu vu » hieu va, hieu ve, hieu su
cuu tre » cua tre, cau tren, cau treo
huu va » cuu va, tuu va
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: ((tu cach) or (thuoc sach)) ky nang x hoi. hieu vu chat huu va ((hanh di) OR (hang di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang x hoi. hieu vu chat huu va ((hanh di) OR (hang di)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) ky nang x hoi. hieu vu chat huu va ((hanh di) OR (hang di)) cuu tre*".