Perhaps you should try some spelling variations:
cau trung » cau truong, cao trung, cau trong
cac trung » cac truong, dac trung, bac trung
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. ((hieu ve) or (hieu va)) ((cau trung) OR (cac trung)) van hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. ((hieu ve) OR (hieu va)) ((cau trung) OR (cac trung)) van hanh vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. ((hieu ve) or (hieu va)) ((cau trung) OR (cac trung)) van hanh vi va triet*".