Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam duc » cao duc, pham duc, nam duoc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu va » lieu va, hieu qua
di cua » dai cua, doi cua, de cua
su sai » su tai, su hai, su dai
sai ky » sac ky
ha hoi » ha noi, xa hoi, va 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 sai ky nang ((ha hoi) or (hoa hoi)). hieu va ((cam duc) OR (cam xuc)) va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang ((ha hoi) OR (hoa hoi)). hieu va ((cam duc) OR (cam xuc)) va hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang ((ha hoi) or (hoa hoi)). hieu va ((cam duc) OR (cam xuc)) va hanh di cua triet*".