Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh phan » trinh han, trinh quan, thanh phan
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh hoa » trinh do, trinh han
tien anh » tieng anh, tien manh, dien anh
trinh ve » trinh he, trinh va, trinh vi
phan ba » phan bo, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (tien anh)) - hanh ((trinh ve) or (trinh hoa)) nhung cong trinh phan ba~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (tien anh)) - hanh ((trinh ve) OR (trinh hoa)) nhung cong trinh phan ba.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (tien anh)) - hanh ((trinh ve) or (trinh hoa)) nhung cong trinh phan ba*.