Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh
trong manh » trong minh, trong anh, trong mach
hoc thieu » toc thieu, hoc hien
van dung » van dong, xay dung, tin dung
toan tai » toan tap, doanh tai, toan ban
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: hoc thieu sang - ((hanh trinh) OR (hanh chinh)) van dung trong manh ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh trinh) OR (hanh chinh)) van dung trong manh ((toan tai) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh trinh) OR (hanh chinh)) van dung trong manh ((toan tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trinh) OR (hanh chinh)) van dung trong manh ((toan tai) or (toan cao))*.