Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
cong lang » cong vang, cong luong, cong quang
lang phan » nang phan, lang thang, lang phong
thong tu » phong tuc, thong tin, thong ke
phan cau » phan dau, phan cac, phan tu

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 ((thong tu) or (trung cap)) thong cong lang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((thong tu) OR (trung cap)) thong cong lang phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((thong tu) or (trung cap)) thong cong lang phan cau*.