Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luan dung » lan dung, luan hung, luan ung
luan dong » luan cong, quan dong, luan nong
hoc hieu » hoc thieu, doc hieu, hoc dieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan 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) or (hoc hien)) manh - hanh trinh ((luan dung) or (luan dong)) cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) manh - hanh trinh ((luan dung) OR (luan dong)) cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) manh - hanh trinh ((luan dung) or (luan dong)) cong tac toan tap*.