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

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