Perhaps you should try some spelling variations:
hieu sau » hieu suat, tieu su, hieu va
sang lai » sang tai, sang lap, mang lai
ky sang » ky nang, ky dang, ky tang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » tieu su, hieu so, hieu suat
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky
cua te » cua tu
xu va » xu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bai ky sang lai hoi. ((hieu su) OR (hieu sau)) chao xu va ((hanh di) or (hanh de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky sang lai hoi. ((hieu su) OR (hieu sau)) chao xu va ((hanh di) OR (hanh de)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bai ky sang lai hoi. ((hieu su) OR (hieu sau)) chao xu va ((hanh di) or (hanh de)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu bai ky sang lai hoi. ((hieu su) OR (hieu sau)) chao xu va ((hanh di) or (hanh de)) cua te*.