Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau tren » cu tren, dau tren, ca tren
nang co » nang cao, nang doc, nang noi
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
co hoi » co hoc, co loi
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang co hoi. ((hieu ve) OR (hieu va)) cam duc va hanh vi ((cua te) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang co hoi. ((hieu ve) OR (hieu va)) cam duc va hanh vi ((cua te) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang co hoi. ((hieu ve) OR (hieu va)) cam duc va hanh vi ((cua te) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang co hoi. ((hieu ve) OR (hieu va)) cam duc va hanh vi ((cua te) or (cau tren))*.