Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, hanh va
cham tuc » nham thuc, pham thuc, tham thuc
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
tuc va » thuc va, truc va, tuc xa

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