Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
diep quang » dinh quang
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
thanh than » thanh thang, thanh toan, thanh phan
hieu quan » hieu qua, lieu quan, thien quan
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien ((diep quang) or (hieu quan)) - hanh trinh va thong cong ((thanh than) OR (thanh thanh)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien ((diep quang) OR (hieu quan)) - hanh trinh va thong cong ((thanh than) OR (thanh thanh)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thien ((diep quang) or (hieu quan)) - hanh trinh va thong cong ((thanh than) OR (thanh thanh)) cap".
• Adding a wildcard symbol may retrieve word variants: thien ((diep quang) or (hieu quan)) - hanh trinh va thong cong ((thanh than) OR (thanh thanh)) cap*.