Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, dua tren
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
hieu ve » hieu van
ty nang » ky nang, ty xang, ty hang
x hoi » xa hoi, o hoi, x ho

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 x hoi. ((hieu ve) or (hieu va)) cam luc van hanh lai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. ((hieu ve) OR (hieu va)) cam luc van hanh lai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. ((hieu ve) or (hieu va)) cam luc van hanh lai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. ((hieu ve) or (hieu va)) cam luc van hanh lai ((cua tre) OR (cua triet))*.