Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
trinh van » trinh han, trinh quan, trinh toan
dang cong » dung cong
dang tran » quang tran, hoang tran, dang van
cau sach » cao sach, hau sach, rau sach
trinh va » trinh vat, trinh ve, trinh vi
te cau » ke cau, le cau, te cao

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

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