Perhaps you should try some spelling variations:
khong trong » khoang trong, thong trong, phong trong
phong chong » thong thong
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
phan cac » nhan cach, phan lap, phan van
phan dau » phan tu, hang dau
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trinh luat ((phong chong) or (khong trong)) dan ((phan cac) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh luat ((phong chong) OR (khong trong)) dan ((phan cac) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh luat ((phong chong) or (khong trong)) dan ((phan cac) or (phan dau))*.