Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
doc sach » hoc sach, toc sach, nuoc sach
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
hanh tai » thanh tai, hang tai, han tai
ty nang » ty xang, ty hang, ly nang
hieu vi » hieu voi, hieu va, hieu ve
tai cua » thai cua, tai cuc, tri cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ((ty nang) or (ky nang)) xa hoi. hieu vi pham thuc day hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ((ty nang) OR (ky nang)) xa hoi. hieu vi pham thuc day hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: doc sach ((ty nang) or (ky nang)) xa hoi. hieu vi pham thuc day hanh tai cua triet*.