Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
truc ban » thuc ban, truc dan, truc van
hieu kem » hieu ky, hieu ve
kem cau » ket cau, ke cau, kem chu
ky lang » ky nang, ky dang, ky tang
hanh de » hanh ve
va hoi » va hoc, va hoa
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang ((va hoi) or (xa hoi)). hieu kem cau truc ban ((hanh de) or (hanh kem)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ((va hoi) OR (xa hoi)). hieu kem cau truc ban ((hanh de) OR (hanh kem)) cua triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ((va hoi) or (xa hoi)). hieu kem cau truc ban ((hanh de) or (hanh kem)) cua triet*.