Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
cac duc » cac du, cao duc, cac dac
sach ty » sach y, sach tu, sach thu
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
qua cac » cua cac
ma hoi » mai hoi, xa hoi, me hoi
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ((ma hoi) or (ma hoa)). hieu qua cac duc ((va hanh) OR (va thanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((ma hoi) OR (ma hoa)). hieu qua cac duc ((va hanh) OR (va thanh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((ma hoi) or (ma hoa)). hieu qua cac duc ((va hanh) OR (va thanh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((ma hoi) or (ma hoa)). hieu qua cac duc ((va hanh) OR (va thanh)) di cua triet*.