Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh cua » manh cua, hang cua, hanh sua
cua cua » cua chua, ca cua, qua cua
va hanh » van hanh, va thanh, va danh
su sach » so sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
ve chat » va chat, van chat
va cam » va cham, va cac, va cao

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 (vu sach)) ty nang ma hoa. hieu ((ve chat) or (va cam)) duc va hanh cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang ma hoa. hieu ((ve chat) OR (va cam)) duc va hanh cua cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ty nang ma hoa. hieu ((ve chat) or (va cam)) duc va hanh cua cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ty nang ma hoa. hieu ((ve chat) or (va cam)) duc va hanh cua cua triet*.