Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc day
vi cua » vai cua, di cua
sac ky » sai ky
ve nam » he nam, va nam, le nam
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 (cac ky)) nang xa hoi. hieu ve nam ((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 (cac ky)) nang xa hoi. hieu ve nam ((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 (cac ky)) nang xa hoi. hieu ve nam ((thuc va) OR (thuc dan)) thanh vi cua tu*".