Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
thuc dan » thuc hanh, hoc dan, thuc vat
thuc va » thuc vat, thuc day
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
sac ky » cac ky
va nay » va ngay, va cay
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: vu ((sac ky) or (sai ky)) nang xa hoi. hieu va nay ((thuc va) OR (thuc dan)) thanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sac ky) OR (sai ky)) nang xa hoi. hieu va nay ((thuc va) OR (thuc dan)) thanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sac ky) or (sai ky)) nang xa hoi. hieu va nay ((thuc va) OR (thuc dan)) thanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: vu ((sac ky) or (sai ky)) nang xa hoi. hieu va nay ((thuc va) OR (thuc dan)) thanh vi cua tu*.