Perhaps you should try some spelling variations:
thue hanh » thue thanh, thuy hanh, thuc thanh
hanh dam » thanh dam, hanh lam, hanh nam
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
ve cam » ve cham, ve cac, va cam
dam va » dam van, nam va, dam ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((thue hanh) OR (thuc hanh)) xa hoi. hieu ve cam ((xuc van) or (luc van)) hanh dam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thue hanh) OR (thuc hanh)) xa hoi. hieu ve cam ((xuc van) OR (luc van)) hanh dam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thue hanh) OR (thuc hanh)) xa hoi. hieu ve cam ((xuc van) or (luc van)) hanh dam va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thue hanh) OR (thuc hanh)) xa hoi. hieu ve cam ((xuc van) or (luc van)) hanh dam va triet*.