Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, va triet
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
su cach » su sach, tu cach, cuu cach
hieu ve » hieu va, hieu van
su cac » tu cac, su cao, su can
ve cac » va cac, vien cac
cac su » cach su, cac sau, cac du
x hoi » xa hoi, o hoi, x ho
su va » su van, tu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cac) or (su cach)) ky nang x hoi. hieu ve cac su va thanh dai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su cach)) ky nang x hoi. hieu ve cac su va thanh dai ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cac) or (su cach)) ky nang x hoi. hieu ve cac su va thanh dai ((cua triet) OR (su triet))*".