Perhaps you should try some spelling variations:
chet duoc » che duoc, cho duoc, che quoc
chat duc » chat xuc, chat doc, pham duc
hanh dai » hanh tai, hanh dao, vanh dai
hieu sau » hieu suat, tieu su, hieu va
tang lai » trang lai, tang tai, tang loi
va hanh » van hanh, va thanh, va danh
ky tang » ky nang, ky dang, kho tang
hieu su » tieu su, hieu so, hieu suat
lai hoi » dai hoi, lai hoa, lai roi
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 cac ky tang lai hoi. ((hieu su) or (hieu sau)) ((chat duc) OR (chet duoc)) va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky tang lai hoi. ((hieu su) OR (hieu sau)) ((chat duc) OR (chet duoc)) va hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky tang lai hoi. ((hieu su) or (hieu sau)) ((chat duc) OR (chet duoc)) va hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu cac ky tang lai hoi. ((hieu su) or (hieu sau)) ((chat duc) OR (chet duoc)) va hanh dai cua te*.