Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu manh - canh trinh va hang cong tac ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - canh trinh va hang cong tac ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - canh trinh va hang cong tac ((toan ban) OR (van ban))*.