Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
thanh tay » thanh tai, thanh toan, thanh thuy
toc hieu » toc thieu, doc hieu, hoc thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - hanh sinh vat ((nhung cong) or (dung cong)) ban ((thanh lap) or (thanh tay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - hanh sinh vat ((nhung cong) OR (dung cong)) ban ((thanh lap) OR (thanh tay)).
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - hanh sinh vat ((nhung cong) or (dung cong)) ban ((thanh lap) or (thanh tay))*.