Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoang manh » hoang minh, hoang anh, hoang xanh
lanh tranh » canh tranh, lan tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
cong tac » cong ty
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: theo chieu tinh - ((hoang manh) or (lanh tranh)) cua nhung cong tac ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tinh - ((hoang manh) OR (lanh tranh)) cua nhung cong tac ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - ((hoang manh) or (lanh tranh)) cua nhung cong tac ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - ((hoang manh) or (lanh tranh)) cua nhung cong tac ((toan cao) OR (toan ban))*.