Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vat dan » va dan, van dan, vat ran
dan dai » dat dai, can dai, dan dat
te sac » te sach, te cac, te san
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
va am » va lam

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) OR (va cam)) thuc vat dan dai cua 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) OR (va cam)) thuc vat dan dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (ve cac)) ky nang x hoi. hieu ((va am) OR (va cam)) thuc vat dan dai cua triet*.