Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong ngang » cong nhan, cong quang, cong lang
ngang toan » nganh toan, dang toan, quang toan
tieu xanh » tieu danh, chieu xanh, dieu hanh
toan cao » toan ban, toan tap
va hanh » van hanh, va thanh, va danh
va nang » van nang, da nang, cam nang

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - thanh trung ((va hanh) OR (va nang)) cong ngang toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - thanh trung ((va hanh) OR (va nang)) cong ngang toan cao*.