Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
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 (tu cac)) tu nang x hoi. hieu va ((cam duc) OR (cao duc)) va hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (tu cac)) tu nang x hoi. hieu va ((cam duc) OR (cao duc)) va hanh dai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (tu cac)) tu nang x hoi. hieu va ((cam duc) OR (cao duc)) va hanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (tu cac)) tu nang x hoi. hieu va ((cam duc) OR (cao duc)) va hanh dai cua viet*.