Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
san cua » sang cua, ban cua, dan cua
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty hang, ly nang
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) OR (ty xang)) ((o hoi) or (o hai)). hieu va cam luc va thanh san cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) ((o hoi) OR (o hai)). hieu va cam luc va thanh san cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) ((o hoi) or (o hai)). hieu va cam luc va thanh san cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) ((o hoi) or (o hai)). hieu va cam luc va thanh san cua triet*.