Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
trinh van » trinh han, trinh quan, trinh toan
trong san » trong cac, cong san, dong san
trinh va » trinh vat, trinh ve, trinh vi
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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

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