Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc va » thuc va, thuoc ma, thuong va
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
voi hoa » voi hoat, voi khoa, boi hoa
sac ky » cac ky
va lam » van lam, va lap
vi hoa » vi hoc, va hoa, bi hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sac ky) or (sai ky)) nang xa hoi. hieu va lam thuoc va hanh ((vi hoa) OR (voi hoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sac ky) OR (sai ky)) nang xa hoi. hieu va lam thuoc va hanh ((vi hoa) OR (voi hoa)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sac ky) or (sai ky)) nang xa hoi. hieu va lam thuoc va hanh ((vi hoa) OR (voi hoa)) viet".
• Adding a wildcard symbol may retrieve word variants: thuat ((sac ky) or (sai ky)) nang xa hoi. hieu va lam thuoc va hanh ((vi hoa) OR (voi hoa)) viet*.