Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
lang ha » long ha
hieu va » lieu va, hieu qua
sat ban » sao ban, sat van, bat ban
y lang » o lang, _ lang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
di cua » doi cua, de cua, do cua
khao » khac, khai, thao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y lang ha hoi. hieu va khao sat ban hanh ((di cua) OR (dai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y lang ha hoi. hieu va khao sat ban hanh ((di cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach y lang ha hoi. hieu va khao sat ban hanh ((di cua) OR (dai cua)) tre*.