Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thong cong » trong cong, tong cong, thong thong
trinh van » trinh han, trinh quan, trinh toan
trinh va » trinh vat, trinh ve, trinh vi
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
hoan » hoang, hoa, soan

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

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