Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh tran » hanh trang, thanh tran, hanh tram
tong cong » trong cong, cong cong, dung cong
tran van » luan van
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban
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 tran van ((thong cong) OR (tong cong)) dan ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh tran van ((thong cong) OR (tong cong)) dan ((toan tai) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - hanh tran van ((thong cong) OR (tong cong)) dan ((toan tai) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh tran van ((thong cong) OR (tong cong)) dan ((toan tai) or (toan tap))*.