Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh phap » trinh phan, trinh han, trinh chat
phap thong » phap phong, phap chong, pho thong
thong cong » trong cong, tong cong, thong thong
hoc dieu » hoc thieu, hoc hien
tap toan » tap doan, bai toan
tap quan » tac quan, hai quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc dieu) or (toc thieu)) tinh - hanh trinh phap thong cong ((tap toan) OR (tap quan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (toc thieu)) tinh - hanh trinh phap thong cong ((tap toan) OR (tap quan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc dieu) or (toc thieu)) tinh - hanh trinh phap thong cong ((tap toan) OR (tap quan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc dieu) or (toc thieu)) tinh - hanh trinh phap thong cong ((tap toan) OR (tap quan)) cau*.