Perhaps you should try some spelling variations:
trinh ngam » trinh nghe, trinh nha, trinh cham
trinh ngan » chinh ngan, trinh han, trinh toan
trinh quan » tinh quang, trinh luat, trinh han
trinh chao » trinh chat, trinh han, trinh co
cau cong » cac cong, cao cong, cay cong
cuu cong » cua cong, thu cong, cac cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((cau cong) OR (cuu cong)) ((((trinh ngam) or (trinh ngan))) or (((trinh quan) or (trinh chao))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cau cong) OR (cuu cong)) ((((trinh ngam) OR (trinh ngan))) OR (((trinh quan) OR (trinh chao)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cau cong) OR (cuu cong)) ((((trinh ngam) or (trinh ngan))) or (((trinh quan) or (trinh chao))))".
• Adding a wildcard symbol may retrieve word variants: ((cau cong) OR (cuu cong)) ((((trinh ngam) or (trinh ngan))) or (((trinh quan) or (trinh chao))))*.