Perhaps you should try some spelling variations:
trong manh » trong minh, trong anh, trong mach
chai tinh » chau tinh, thai tinh, cham tinh
manh toan » thanh toan, anh tuan, tinh toan
doi chai » doi chi, doi thoai, doi cua
tranh va » tranh van, trang va, trinh va
tran van » luan van
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: doi chai tinh - canh ((tranh va) or (tran van)) dung trong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chai tinh - canh ((tranh va) OR (tran van)) dung trong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chai tinh - canh ((tranh va) or (tran van)) dung trong manh toan cao*.