Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
du van » duy van, duc van, tu van
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: tu sach y tang ma hoi. hieu ve cac du van hanh vi cua vat~.
• Adding a wildcard symbol may retrieve word variants: tu sach y tang ma hoi. hieu ve cac du van hanh vi cua vat*.