Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
lam truoc » lam thuoc, nam truoc, lam truong
truoc va » truc va, thuoc va, truong va
hanh voi » hanh vi, hanh noi, hanh moi
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
voi hoa » voi hoat, voi khoa, boi hoa
sac ky » cac ky, sai ky

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 lang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va hanh voi hoa viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky lang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va hanh voi hoa viet".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky lang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va hanh voi hoa viet*.