Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
sach ki » sach kinh, sach bai, sach kem
ki nang » ky nang
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ki nang x ho. hieu va cam duc va hanh vi ((((cua tre) OR (cua triet))) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ki nang x ho. hieu va cam duc va hanh vi ((((cua tre) OR (cua triet))) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ki nang x ho. hieu va cam duc va hanh vi ((((cua tre) OR (cua triet))) or (cau tren))*".