Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
dang thanh » dong thanh, dang hanh, hoang thanh
theo lieu » theo tieu, theo chieu, theo yeu
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh cua » tinh cua, trinh luat, trinh luan
dang cong » dung cong
lang toan » dang toan, lang thang, lang thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo lieu tinh - hanh ((trinh cua) OR (trinh quan)) dang cong ((lang toan) or (dang thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo lieu tinh - hanh ((trinh cua) OR (trinh quan)) dang cong ((lang toan) OR (dang thanh)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo lieu tinh - hanh ((trinh cua) OR (trinh quan)) dang cong ((lang toan) or (dang thanh)) cao".
• Adding a wildcard symbol may retrieve word variants: theo lieu tinh - hanh ((trinh cua) OR (trinh quan)) dang cong ((lang toan) or (dang thanh)) cao*.