Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
thuc day » thuc dan, thuc vat
thanh vi » hanh vi, thanh va, thanh ve
hieu van » thien van, lieu va, hieu ve
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sac ky nang xa hoi. ((hieu van) or (hieu va)) cau ((thuc va) or (thuc day)) thanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky nang xa hoi. ((hieu van) OR (hieu va)) cau ((thuc va) OR (thuc day)) thanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky nang xa hoi. ((hieu van) or (hieu va)) cau ((thuc va) or (thuc day)) thanh vi cua tu*.