Perhaps you should try some spelling variations:
trinh suat » trinh luat, trinh sat, trinh luan
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
chi xanh » chi anh, chi danh, chi hanh
van toan » van tuan, van tan, van thanh
dan chan » dan gian, dan ca, van chat
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - hanh ((trinh suat) or (trinh quan)) thong cong ((van toan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh ((trinh suat) OR (trinh quan)) thong cong ((van toan) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh ((trinh suat) or (trinh quan)) thong cong ((van toan) or (dan chan)) cau*.