Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
trinh vatn » trinh van, trinh han, trinh san
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc thieu)) xanh - hanh ((trinh vat) or (trinh vatn)) dung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) xanh - hanh ((trinh vat) OR (trinh vatn)) dung cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) xanh - hanh ((trinh vat) or (trinh vatn)) dung cong san toan ban*.