Perhaps you should try some spelling variations:
khao bat » khao sat, khao ha, kho bac
ban hanh » ban hang
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
bat ban » bat can, bat bao, byt ban
y lang » o lang, _ lang, tay lang
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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 xa hoi. ((hieu va) or (hieu qua)) khao bat ban hanh ((di cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang xa hoi. ((hieu va) OR (hieu qua)) khao bat ban hanh ((di cua) OR (de cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y lang xa hoi. ((hieu va) or (hieu qua)) khao bat ban hanh ((di cua) OR (de cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. ((hieu va) or (hieu qua)) khao bat ban hanh ((di cua) OR (de cua)) tre*.