Perhaps you should try some spelling variations:
tranh luan » trinh luat, doanh luan, tang luan
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cao » toan cao, thai cao, than cap
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 ((tranh luan) OR (trinh luan)) nhung cong tac than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - hanh ((tranh luan) OR (trinh luan)) nhung cong tac than cao".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh ((tranh luan) OR (trinh luan)) nhung cong tac than cao*.