Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh vat » trinh van, trinh luat, sinh vat
lang cong » dang cong, bang cong, hang cong
toc hieu » toc thieu, doc hieu, hoc thieu
trinh ve » trinh he, trinh va, trinh vi
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - hanh ((trinh vat) or (trinh ve)) lang cong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - hanh ((trinh vat) OR (trinh ve)) lang cong ((van toan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - hanh ((trinh vat) or (trinh ve)) lang cong ((van toan) or (van tuan)) cau*.