Perhaps you should try some spelling variations:
ban hanh » ban hang
sach ty » sach y, sach tu, sach thu
duc ban » duc tan, duc van, dua ban
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
hang ca » hang va, nang cao, hang tai
hang xa » hoang xa, hang va, lang xa
cua tuc » cua duc, cua tu, cua thuoc
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: su sach ty ((hang xa) or (hang ca)) hoi. hieu ve pham duc ban hanh vi ((cua te) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((hang xa) OR (hang ca)) hoi. hieu ve pham duc ban hanh vi ((cua te) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((hang xa) or (hang ca)) hoi. hieu ve pham duc ban hanh vi ((cua te) or (cua tuc))*.