Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
vai cua » hai cua, lai cua, bai cua
so sac » so sach, so dac
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam
di cua » doi cua, de cua, do cua

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

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