Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
hieu ve » hieu van
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
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: nuoc sach ly hang xa hoi. ((hieu ve) OR (hieu va)) cham ((luc va) or (tuc va)) hanh vi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ly hang xa hoi. ((hieu ve) OR (hieu va)) cham ((luc va) OR (tuc va)) hanh vi cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ly hang xa hoi. ((hieu ve) OR (hieu va)) cham ((luc va) or (tuc va)) hanh vi cua su".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ly hang xa hoi. ((hieu ve) OR (hieu va)) cham ((luc va) or (tuc va)) hanh vi cua su*.