Perhaps you should try some spelling variations:
thuy hanh » thuc hanh, thuy anh, thuy canh
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
thu hanh » thuc hanh, thu thanh, thi hanh
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
te sach » toc sach
hieu ve » hieu va
lam va » nam va, dam va, lam ha

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 ((thu hanh) or (thuy hanh)) xa hoi. ((hieu ve) OR (hieu van)) cac duc van hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu hanh) OR (thuy hanh)) xa hoi. ((hieu ve) OR (hieu van)) cac duc van hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu hanh) or (thuy hanh)) xa hoi. ((hieu ve) OR (hieu van)) cac duc van hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu hanh) or (thuy hanh)) xa hoi. ((hieu ve) OR (hieu van)) cac duc van hanh lam va triet*.