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