Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
trong quan » thong quan, tong quan, thong quang
nhan hang » ngan hang, nhan dang, nha hang
luan dong » luan cong, quan dong, luan nong
quan long » quan lang, quan dong, quan hoang
quan toan » quang toan, quan doan, xuan 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: hoc ((thiet tach) OR (thuat tach)) - nhan hang ((luan dong) or (quan long)) trong quan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (thuat tach)) - nhan hang ((luan dong) OR (quan long)) trong quan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thuat tach)) - nhan hang ((luan dong) or (quan long)) trong quan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (thuat tach)) - nhan hang ((luan dong) or (quan long)) trong quan toan ban*.