Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
cuc ban » cua ban, cac ban, cuu ban
cac cuc » cac cuoc, cac cua, cac nuoc
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
ma hoi » mai hoi, ma hoa, me hoi
5 tang » 6 tang, 7 tang
ve cac » va cac, vien cac
v tang » 6 tang, 7 tang, 9 tang
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) OR (xa 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) OR (xa hoi)). hieu ve cac cuc ban hanh vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v tang) or (5 tang)) ((ma hoi) OR (xa 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) OR (xa hoi)). hieu ve cac cuc ban hanh vi cua tuc*.