Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
cua triet » cua viet, su triet, va triet
viet cua » viec cua, viet ca, viet qua
va cham » va chat, va tham
duc lap » doc lap, duc lai, duc lam
tu cach » tu cac
su sach » so sach, vu sach
va cam » va cac, va cao, va cai
x hoi » xa hoi, o hoi, x ho

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

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