Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
may nang » may nong, ky nang, cam nang
cam duc » cam xuc, cao duc, pham duc
dan dai » dat dai, can dai, dan dat
y nang » ky nang, ly nang, day nang
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao
duc ca » duc cac, duc va, duc ha
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 ((((y nang) OR (may nang))) or (v nang)) xa hoi. lieu va cam duc ca dan dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((((y nang) OR (may nang))) OR (v nang)) xa hoi. lieu va cam duc ca dan dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((((y nang) OR (may nang))) or (v nang)) xa hoi. lieu va cam duc ca dan dai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((((y nang) OR (may nang))) or (v nang)) xa hoi. lieu va cam duc ca dan dai cua triet*.