Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
trinh quan » tinh quang, trinh luat, trinh han
hieu lang » chieu sang, hieu quang, nhieu tang
tinh cua » trinh cua, sinh cua, tranh cua
quan dau » quan cau, qua dau, quan dac
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) or (thong cong)) trinh quan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) OR (thong cong)) trinh quan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) or (thong cong)) trinh quan dau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) or (thong cong)) trinh quan dau*.