Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
hieu van » hieu va, thien van, lieu va
hanh lam » thanh lap, hanh kem, hanh va
sach thu » sach thieu, sach tham, cach thuc
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va
hanh xa » hanh va, hanh ma, hanh xu
xuc va » duc va, tuc va, luc va
lam va » nam va, dam va, lam ha
thiet » thieu

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