Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
manh toan » thanh toan, anh tuan, tinh toan
theo chu » theo chieu, cho chu, chao chu
chu tinh » chau tinh, chua tinh, cuu tinh
dan than » dan chan, ban than, van than

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 chu tinh - hanh tang luan trong cong ((manh toan) OR (dan than)) cao~.
• Adding a wildcard symbol may retrieve word variants: theo chu tinh - hanh tang luan trong cong ((manh toan) or (dan than)) cao*.