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

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