Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
dinh cua » dinh cuu, sinh cua, tinh cua
dinh cu » dinh cuu, dinh chuc, dinh chau
ban cao » ban can, ban co, bac cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - hanh ((dinh cua) or (dinh cu)) nhung cong vang ((ban cao) OR (bao cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((dinh cua) OR (dinh cu)) nhung cong vang ((ban cao) OR (bao cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - hanh ((dinh cua) or (dinh cu)) nhung cong vang ((ban cao) OR (bao cao))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((dinh cua) or (dinh cu)) nhung cong vang ((ban cao) OR (bao cao))*.