Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
hieu ban » hieu van, dieu ban, lieu ban
ngu xanh » ngu anh, ngu danh, ngu hanh
hanh dai » hanh tai, hanh dao, vanh dai
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky ((nang x) or (dang xay)) hoi. hieu ban thanh ngu xanh hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky ((nang x) OR (dang xay)) hoi. hieu ban thanh ngu xanh hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu can ky ((nang x) or (dang xay)) hoi. hieu ban thanh ngu xanh hanh dai cua triet*.