Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
dan dai » dat dai, can dai, dan dat
te sac » te sach, te cac, te san
ve cac » va cac, vien cac
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho
va am » va lam, va cam

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: ((te sac) OR (ve cac)) ky nang x hoi. hieu va am thuc va dan dai ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (ve cac)) ky nang x hoi. hieu va am thuc va dan dai ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (ve cac)) ky nang x hoi. hieu va am thuc va dan dai ((cua triet) OR (su triet))*.