Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
dinh cuua » dinh cua, dinh chua, dinh chuc
dung cong » dung trong
dinh cuu » dinh chi
vang ban » van ban, hang ban, nang ban
ban cao » bao cao, ban can, ban co

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