Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
luan tuong » luan luong, luat thuong, xuan truong
tuong cong » truong cong, trong cong, tong cong
hieu quan » hieu qua, lieu quan, thien quan
doi hieu » doi chieu, doc hieu, doi hien
cong van » cong vang, cong san, song van
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu quan - ((thanh thanh) or (nhanh tinh)) luan tuong cong van ((toan tap) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu quan - ((thanh thanh) OR (nhanh tinh)) luan tuong cong van ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu quan - ((thanh thanh) or (nhanh tinh)) luan tuong cong van ((toan tap) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi hieu quan - ((thanh thanh) or (nhanh tinh)) luan tuong cong van ((toan tap) OR (toan ban))*.