Perhaps you should try some spelling variations:
luan nhung » luan chung, luan hung, quan nhung
cham tinh » chau tinh, cham binh, ha tinh
hanh tong » hanh trong, han tong, hanh dong
tong luan » tang luan, dung luan, hang luan
cha tinh » chau tinh, chai tinh, chua tinh
cong tac » cong ty
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 ((cha tinh) or (cham tinh)) - hanh tong luan nhung ((cong san) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((cha tinh) OR (cham tinh)) - hanh tong luan nhung ((cong san) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((cha tinh) or (cham tinh)) - hanh tong luan nhung ((cong san) or (cong tac)) toan cau*.