Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
dang lai » dang loai, dang hai, dung lai
ky dang » ky nang, ky danh
lai hoa » dai hoa, loai hoc
hieu su » hieu sau, tieu su, hieu so
danh vi » hanh vi, dinh vi, danh di
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu
xu va » xu van, tu va, vu va
su va » su van, tu va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang lai hoa. ((hieu su) OR (hieu suat)) chao ((xu va) OR (su va)) danh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang lai hoa. ((hieu su) or (hieu suat)) chao ((xu va) OR (su va)) danh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang lai hoa. ((hieu su) or (hieu suat)) chao ((xu va) OR (su va)) danh vi cua te*.