Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh van » trinh han, trinh quan, trinh toan
theo chu » theo chieu, cho chu, chao chu
chu tinh » chau tinh, chua tinh, cuu tinh
trinh va » trinh vat, trinh ve, trinh vi
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

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