Perhaps you should try some spelling variations:
trang lai » trang tai, trang vai, trang lam
tang lai » tang tai, tang loi, mang lai
hanh dai » hanh tai, hanh dao, vanh dai
chat luc » chat xuc, chat lua, nhan luc
hieu sau » hieu suat, tieu su, hieu va
hieu su » tieu su, hieu so, hieu suat
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cua te » cua tu

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

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