Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, thong thong, phong chong
lieu tinh » trieu tinh, diep tinh, bien tinh
tong cong » trong cong, cong cong, dung cong
tap toan » tap doan, bai toan
tap quan » tac quan, hai quan
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - hanh trinh luat ((thong cong) or (tong cong)) ((tap toan) or (tap quan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh trinh luat ((thong cong) OR (tong cong)) ((tap toan) OR (tap quan)) tap.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh trinh luat ((thong cong) or (tong cong)) ((tap toan) or (tap quan)) tap*.