Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thuc dan » thuc hanh, hoc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
nang xa » lang xa, nang ma, mang xa
via cua » gia cua, gian cua, giau cua
hieu he » hieu ve, hiem he, hieu le
vu sac » vu sach, vu san, va sac
va cua » va chua, ca cua, ma cua
he nam » ha nam, nghe nam
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky ((nang xa) or (nang x)) hoi. hieu he nam thuc dan thanh ((va cua) OR (via cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky ((nang xa) OR (nang x)) hoi. hieu he nam thuc dan thanh ((va cua) OR (via cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky ((nang xa) or (nang x)) hoi. hieu he nam thuc dan thanh ((va cua) OR (via cua)) te*".