Perhaps you should try some spelling variations:
phan thanh » pham thanh, ban thanh, van thanh
thong cong » trong cong, tong cong, thong thong
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
thanh ha » thanh hoa, thanh hai, nhanh ha
ha thong » hoa thong, nha thong, he thong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) xanh - phan thanh ha thong cong ((xuan toan) or (thanh san)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - phan thanh ha thong cong ((xuan toan) OR (thanh san)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - phan thanh ha thong cong ((xuan toan) or (thanh san)) cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - phan thanh ha thong cong ((xuan toan) or (thanh san)) cao*.