Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
nang lai » mang lai, nang cai, nang hai
nang tai » hang tai, tang tai, sang tai
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xac ky » cac ky, sac ky, bac ky
luc va » tuc va, loc va
su xac » pu xac, su cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky ((nang lai) OR (nang tai)) hoa. hieu ve cam ((luc va) OR (duc va)) thanh tai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky ((nang lai) OR (nang tai)) hoa. hieu ve cam ((luc va) or (duc va)) thanh tai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su xac ky ((nang lai) OR (nang tai)) hoa. hieu ve cam ((luc va) or (duc va)) thanh tai cua triet*.