Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh vin » trinh van, trinh tin, trinh ven
trinh vi » trinh va, trinh ve, trinh viet
cong van » cong vang, song van, cong tan
cong san » cong tac
ho lieu » so lieu, co lieu, ho kieu
tan cao » toan cao, tao cao, tay cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - canh ((trinh vi) OR (trinh vin)) nhung ((cong van) OR (cong san)) tan cao~.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - canh ((trinh vi) or (trinh vin)) nhung ((cong van) or (cong san)) tan cao*.