Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
hieu lang » chieu sang, hieu quang, nhieu tang
quan tong » quan trong, quan dong, quan long
thong van » trong van, thong va, thong quan
toan tap » toan ban
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 quan tong ((phung van) or (thong van)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh quan tong ((phung van) OR (thong van)) toan tap*.