Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua hang » cua dang, cua nhung, cua cong
toan cao » toan tap
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: hoc hieu manh - hanh trinh cua hang cong trinh ((von tai) or (((toan cao) or (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trinh cua hang cong trinh ((von tai) OR (((toan cao) OR (toan ban)))).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh cua hang cong trinh ((von tai) or (((toan cao) or (toan ban))))*.