Perhaps you should try some spelling variations:
trinh luan » trinh quan, trinh han, trinh toan
phuong van » phung van, phuong lan, phuong va
lieu tinh » trieu tinh, diep tinh, bien tinh
phong van » phung van, thong van, phong va
thanh hai » thanh phan, thanh hoa, thanh san
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 luan) or (trinh luat)) nhung ((phuong van) OR (phong van)) thanh hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh ((trinh luan) OR (trinh luat)) nhung ((phuong van) OR (phong van)) thanh hai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - hanh ((trinh luan) or (trinh luat)) nhung ((phuong van) OR (phong van)) thanh hai".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh ((trinh luan) or (trinh luat)) nhung ((phuong van) OR (phong van)) thanh hai*.