Perhaps you should try some spelling variations:
thuat sai » thuat san, thuat cai, thuat tai
thuat bai » thuat bao, thuyet bai, thuat xay
lam truoc » lam thuoc, nam truoc, lam truong
truoc va » truc va, thuoc va, truong va
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va lam » van lam, va lap
vi hoa » voi hoa, vi hoc, va 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 sai) OR (thuat bai)) ky ((nang xa) or (nang x)) hoi. hieu va lam truoc va hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sai) OR (thuat bai)) ky ((nang xa) OR (nang x)) hoi. hieu va lam truoc va hanh vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sai) OR (thuat bai)) ky ((nang xa) or (nang x)) hoi. hieu va lam truoc va hanh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: ((thuat sai) OR (thuat bai)) ky ((nang xa) or (nang x)) hoi. hieu va lam truoc va hanh vi hoa viet*.