Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
hieu quang » thieu quang, hieu quan, hieu qua
trinh quan » tinh quang, trinh luat, trinh han
hieu lang » chieu sang, nhieu tang, hieu van
quan cong » qua cong, luan cong, quan dong
nong san » cong san, dong san, trong san
nong dan » cong dan, nguong dan, huong dan
toan tap » toan ban

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) OR (hieu quang)) - thanh trinh quan cong ((nong san) or (nong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - thanh trinh quan cong ((nong san) OR (nong dan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (hieu quang)) - thanh trinh quan cong ((nong san) or (nong dan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (hieu quang)) - thanh trinh quan cong ((nong san) or (nong dan)) toan tap*.