Perhaps you should try some spelling variations:
trong dang » truong dang, trong dan, trong dong
dang toan » dang tran, dan toan, dung toan
chi danh » chi dan, chi anh, chi dinh
trang su » trang suc, trong su, trang du
toan cao » toan ban, toan tap
doi chi » doi khi
tang su » tang suc, dang su, nang su

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi danh - hanh ((trang su) or (tang su)) dung trong dang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi danh - hanh ((trang su) OR (tang su)) dung trong dang toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi danh - hanh ((trang su) or (tang su)) dung trong dang toan cao*.