Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
trung cap » truong cao, trung tam
dang cong » dung cong
cong vong » cong dong, cong cong, cong nong
cap dang » cao dang, cac dang, cap bang
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu

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 trung cap dang cong vong ((tuan cau) or (tuan cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - hanh trung cap dang cong vong ((tuan cau) OR (tuan cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu quang)) - hanh trung cap dang cong vong ((tuan cau) or (tuan cu))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu quang)) - hanh trung cap dang cong vong ((tuan cau) or (tuan cu))*.