Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thanh lam » thanh lap, hanh lam, thanh nam
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
cac duc » cac du, cao duc, cac dac
so sanh » do sanh
su sach » so sach, vu sach
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) ky lang ha hoi. lieu va cac duc va thanh lam ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky lang ha hoi. lieu va cac duc va thanh lam ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ky lang ha hoi. lieu va cac duc va thanh lam ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky lang ha hoi. lieu va cac duc va thanh lam ((cua triet) OR (va triet))*.