Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua trung » cua truong, xuan trung, cua nhung
sinh cua » manh cua, dinh cuu, sinh va
dan toan » dan than, manh toan, xuan toan
dan chan » dan gian, dan ca, van chat
van toan » van tuan, van tan, van thanh
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh sinh cua trung cong ((((dan toan) or (dan chan))) or (van toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh sinh cua trung cong ((((dan toan) OR (dan chan))) OR (van toan)) tap.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh sinh cua trung cong ((((dan toan) or (dan chan))) or (van toan)) tap*.