Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, thien van, lieu va
phan lap » phan dau
chu duc » thu duc, chua duoc, cuu duoc
van chu » van chi, van phu, van cau
sach ky » sach y, sach ty, sach kem
nang o » nang co, nang ho, nang ro
sac ky » cac ky, sai ky
o hoi » co hoi, o hoc, o hai

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: tu ((sach ky) OR (sac ky)) nang o hoi. hieu van chu duc va ((thanh lam) OR (phan lap)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang o hoi. hieu van chu duc va ((thanh lam) or (phan lap)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang o hoi. hieu van chu duc va ((thanh lam) or (phan lap)) cua triet*.