Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
cua chu » sua chua
loc va » hoc va, luc va
cua su » qua su

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 ty hang xa hoi. hieu va cac ((loc va) OR (truc va)) hanh vi ((cua su) OR (cua chu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty hang xa hoi. hieu va cac ((loc va) OR (truc va)) hanh vi ((cua su) OR (cua chu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang xa hoi. hieu va cac ((loc va) OR (truc va)) hanh vi ((cua su) OR (cua chu))*.