Perhaps you should try some spelling variations:
trinh ngam » trinh ngan, trinh nghe, trinh cham
trinh quan » tinh quang, trinh luat, trinh han
trinh phan » trinh han, thanh phan, trinh toan
trinh chat » tinh chat, trinh luat, trinh han
trinh nha » trinh chao, trinh nghe, trinh phap
cau cong » cac cong, cuu cong, cao 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 ((((trinh ngam) or (trinh quan))) or (((((trinh nha) OR (trinh phan))) or (trinh chat))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cau cong ((((trinh ngam) OR (trinh quan))) OR (((((trinh nha) OR (trinh phan))) OR (trinh chat)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cau cong ((((trinh ngam) or (trinh quan))) or (((((trinh nha) OR (trinh phan))) or (trinh chat))))".
• Adding a wildcard symbol may retrieve word variants: cau cong ((((trinh ngam) or (trinh quan))) or (((((trinh nha) OR (trinh phan))) or (trinh chat))))*.