Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh van » trinh van, dinh van, tinh va
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va tinh » may tinh
ty nang » ty xang, ty hang, ly nang
van cua » vang cua, ban cua, dan cua
tu sach » thu sach, su sach, te sach
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
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 (ky nang)) ((o hoi) or (o hai)). hieu va cam tuc va tinh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) ((o hoi) OR (o hai)). hieu va cam tuc va tinh van cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) ((o hoi) or (o hai)). hieu va cam tuc va tinh van cua triet*.