Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
hanh trinh » canh tranh, hanh chinh
trong manh » trong minh, trong anh, trong mach
trinh van » trinh han, trinh quan, trinh toan
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) OR (thieu quang)) - hanh trinh 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) OR (thieu quang)) - hanh trinh 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) OR (thieu quang)) - hanh trinh van dung trong manh ((toan tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu quang)) - hanh trinh van dung trong manh ((toan tai) or (toan cao))*.