Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
hieu ve » hieu va, hieu van
cac cuc » cac cuoc, cac cua, cac nuoc
cuc ban » cua ban, cac ban, cuu ban
cua tuc » cua duc, cua tu, cua thuoc
v tang » 6 tang, 7 tang, 9 tang
5 tang » 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((v tang) or (5 tang)) ma hoi. hieu ve cac cuc ban hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v tang) OR (5 tang)) ma hoi. hieu ve cac cuc ban hanh vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: te sach ((v tang) or (5 tang)) ma hoi. hieu ve cac cuc ban hanh vi cua tuc*.