Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
y tang » ky tang, 6 tang, 7 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) or (toc sach)) y tang ma hoi. hieu ve cam luc ((va thanh) or (ban thanh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y tang ma hoi. hieu ve cam luc ((va thanh) OR (ban thanh)) vi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y tang ma hoi. hieu ve cam luc ((va thanh) or (ban thanh)) vi cua vat*.