Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
dau truc » cau truc, dai truc, doan truc
truc van » truc va, thuc van, truc ban
hieu va » lieu va, hieu qua
lang ha » long ha
hanh de » hanh ve, hanh kem
hanh va » hang va, hanh vi
ky lang » ky nang, ky dang, ky tang
va dau » va dao
ha hoi » hoa hoi, ha noi, xa hoi
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 dau truc van ((hanh de) or (hanh va)) ((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 dau truc van ((hanh de) OR (hanh va)) ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ha hoi. hieu va dau truc van ((hanh de) or (hanh va)) ((cua triet) or (su triet))*.