Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hanh trong » hanh trang, anh trong, hinh trong
trong tuan » trong quan, trung tuan, trong tan
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hien tinh » thien tinh, bien tinh, dien tinh
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
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 (khien tinh)) - hanh trong tuan nhung cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (khien tinh)) - hanh trong tuan nhung cong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (khien tinh)) - hanh trong tuan nhung cong dan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tinh) OR (khien tinh)) - hanh trong tuan nhung cong dan ((toan cau) or (toan cao))*.