Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
chu bang » thu bang, chuc nang, chu quang
hanh dai » hanh tai, hanh dao, vanh dai
thi nang » thi cong, ki nang, thi hanh
te sach » toc sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
huu va » cuu va
tuu va » tu va, cuu va, tru va

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 ((chu bang) or (thi nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((chu bang) OR (thi nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) hanh dai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((chu bang) or (thi nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) hanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ((chu bang) or (thi nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) hanh dai cua viet*.