Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh dai » hanh tai, hanh dao, vanh dai
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
tru nang » tra nang, tri nang, truc nano
tuc van » thuc van, truc van, tuc va
dao tuc » dao duc
hieu va » lieu va, hieu qua
tu nang » tu nong, tu nano, tu lang
va dao » ca dao
dai ve » dap ve, dau ve, dai 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) OR (toc sach)) ((tu nang) or (tru nang)) xa hoi. hieu va dao tuc van hanh dai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((tu nang) OR (tru nang)) xa hoi. hieu va dao tuc van hanh dai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((tu nang) or (tru nang)) xa hoi. hieu va dao tuc van hanh dai ve triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ((tu nang) or (tru nang)) xa hoi. hieu va dao tuc van hanh dai ve triet*.