Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
hanh trung » thanh trung, hanh trang, manh trung
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hien tinh » khien tinh, bien tinh, dien tinh
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien tinh) OR (thien tinh)) - ((hanh trung) or (canh tranh)) tuan nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (thien tinh)) - ((hanh trung) OR (canh tranh)) tuan nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (thien tinh)) - ((hanh trung) or (canh tranh)) tuan nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tinh) OR (thien tinh)) - ((hanh trung) or (canh tranh)) tuan nhung cong tac toan cau*.