Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
truc van » truc va, thuc van, truc ban
hieu va » lieu va, hieu qua
lang ha » long ha
hanh de » hanh kem
hanh ve » hanh vi, hanh va, hanh kem
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
va cau » van cau, va cac, va dau
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 ha hoi. hieu va cau truc van ((hanh de) or (hanh ve)) ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ha hoi. hieu va cau truc van ((hanh de) OR (hanh ve)) ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ha hoi. hieu va cau truc van ((hanh de) or (hanh ve)) ((cua triet) or (su triet))*.