Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trinh han » trinh quan
nho hieu » nha hieu, nho sieu, nhu hieu
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
han dau » hang dau, phan dau, van dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho hieu lang - hanh ((tinh cua) OR (sinh cua)) nhung cong trinh han dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho hieu lang - hanh ((tinh cua) OR (sinh cua)) nhung cong trinh han dau".
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - hanh ((tinh cua) OR (sinh cua)) nhung cong trinh han dau*.