Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh hai
lap cua » lai cua, tap cua, lam cua
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) OR (sach y)) nang o hoi. hieu ve cam ((xuc va) or (luc va)) thanh lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach y)) nang o hoi. hieu ve cam ((xuc va) OR (luc va)) thanh lap cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sach y)) nang o hoi. hieu ve cam ((xuc va) or (luc va)) thanh lap cua triet".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sach y)) nang o hoi. hieu ve cam ((xuc va) or (luc va)) thanh lap cua triet*.