Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, dua tren
hac du » cac du, hac de, hoc du
han du » han dau, van du, han tu
anh di » danh di, xanh di, anh d
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 ty nang x hoi. hieu van ((hac du) or (han du)) van anh di ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang x hoi. hieu van ((hac du) OR (han du)) van anh di ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang x hoi. hieu van ((hac du) or (han du)) van anh di ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang x hoi. hieu van ((hac du) or (han du)) van anh di ((cua tre) OR (cua triet))*.