Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
huong manh » duong manh, hung manh, luong manh
hoc thieu » toc thieu, hoc hien
manh toan » thanh toan, anh tuan, tinh toan
van hanh » van thanh, ban hanh, van anh
toan cau » toan cao, toan ban, toan tap
va danh » va dinh, va dan, va hanh
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh trung ((((van hanh) or (va danh))) or (va lang)) huong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((((van hanh) OR (va danh))) OR (va lang)) huong manh toan cau*.