Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
hanh trinh » canh tranh, hanh chinh
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
va phuong » va thuong, cac phuong
thong tan » thong than, thong tran, thong tin
trinh va » trinh van, trinh vat, trinh ve
van chat » cao chat
tan van » tran van, tang van, luan van

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (nhieu tang)) - hanh trinh va phuong thong tan van chat~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (nhieu tang)) - hanh trinh va phuong thong tan van chat*.