Perhaps you should try some spelling variations:
hanh tang » hanh trang, anh tang, hanh mang
luan hang » luan nang, luan han, luan hung
theo cuu » khao cuu, thao cua, theo yeu
theo chu » theo chieu, cho chu, chao chu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo cuu) OR (theo chu)) tinh - hanh tang ((luan hang) OR (van dong)) cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo cuu) OR (theo chu)) tinh - hanh tang ((luan hang) or (van dong)) cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo cuu) OR (theo chu)) tinh - hanh tang ((luan hang) or (van dong)) cong tac toan cau*.