Perhaps you should try some spelling variations:
thuy hanh » thuc hanh, thuy anh, thuy canh
thu hanh » thuc hanh, thu thanh, thi hanh
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, hieu van
lam va » nam va, dam va, am va
lam ha » nam ha, dam ha, lam chat
ve cac » va cac, vien cac

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 cac duc van hanh ((lam va) or (lam ha)) 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 cac duc van hanh ((lam va) OR (lam ha)) 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 cac duc van hanh ((lam va) or (lam ha)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve cac duc van hanh ((lam va) or (lam ha)) triet*.