Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh hai
luoc can » luc canh, hoc can, luoc dai
luoc van » luoc va, luc van, luot van
hieu va » lieu va, hieu qua
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
te sach » toc sach
va cam » va cham, va cac, va cao
cua te » cua tu
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: te sach vu nang x hoi. hieu va cam ((luoc van) OR (luoc can)) thanh lap ((cua te) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang x hoi. hieu va cam ((luoc van) OR (luoc can)) thanh lap ((cua te) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu nang x hoi. hieu va cam ((luoc van) OR (luoc can)) thanh lap ((cua te) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach vu nang x hoi. hieu va cam ((luoc van) OR (luoc can)) thanh lap ((cua te) or (cua triet))*.