Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
truc van » truc va, thuc van, truc ban
hieu ket » hieu kem, thien ket, lien ket
ky lang » ky nang, ky dang, ky tang
hanh de » hanh kem
hanh ve » hanh vi, hanh va, hanh kem
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 ket cau truc van ((hanh de) or (hanh ve)) 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 ket cau truc van ((hanh de) OR (hanh ve)) cua triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ((va hoi) or (xa hoi)). hieu ket cau truc van ((hanh de) or (hanh ve)) cua triet*.