Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
hanh le » thanh le, hanh ve, hanh de
va cham » va chat, va tham
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc va
le cua » ly cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach thu) OR (sach thue)) hang xa hoi. hieu va cham ((soc va) or (doc va)) hanh le cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach thu) OR (sach thue)) hang xa hoi. hieu va cham ((soc va) OR (doc va)) hanh le cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach thu) OR (sach thue)) hang xa hoi. hieu va cham ((soc va) or (doc va)) hanh le cua te".
• Adding a wildcard symbol may retrieve word variants: toc ((sach thu) OR (sach thue)) hang xa hoi. hieu va cham ((soc va) or (doc va)) hanh le cua te*.