Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh toan
trinh han » trinh quan
nang cong » dang cong, bang cong, hang cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - hanh ((trinh luan) OR (trinh han)) ((nang cong) or (nang song)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hanh ((trinh luan) OR (trinh han)) ((nang cong) OR (nang song)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - hanh ((trinh luan) OR (trinh han)) ((nang cong) or (nang song)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh ((trinh luan) OR (trinh han)) ((nang cong) or (nang song)) dan toan cao*.