Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vien cac » vien bach, vien dai, vien da
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
ve cac » va cac

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 ((ky lang) or (ky tang)) xa hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) xa hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) or (ky tang)) xa hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) or (ky tang)) xa hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua triet*.