Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
cao hoi » cau hoi, co hoi, cao hoc
ca danh » cao danh, cau danh, va danh
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau treo
ca dan » cac dan, ca dao

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 nang cao hoi. hieu van chat truc ((ca danh) or (ca dan)) dai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang cao hoi. hieu van chat truc ((ca danh) OR (ca dan)) dai ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang cao hoi. hieu van chat truc ((ca danh) or (ca dan)) dai ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang cao hoi. hieu van chat truc ((ca danh) or (ca dan)) dai ((cuu tre) OR (cau tren))*.