Perhaps you should try some spelling variations:
thuat sai » thuat bai, thuat san, thuat cai
lam truoc » lam thuoc, nam truoc, lam truong
truoc va » truc va, thuoc va, truong va
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu va » hieu qua
lang xa » lang ha, dang xay, lang van
sai ky » sac ky
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 ky ((lang xa) or (nang x)) hoi. ((hieu va) or (lieu va)) lam truoc va danh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sai ky ((lang xa) OR (nang x)) hoi. ((hieu va) OR (lieu va)) lam truoc va danh vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: thuat sai ky ((lang xa) or (nang x)) hoi. ((hieu va) or (lieu va)) lam truoc va danh vi hoa viet*.