Perhaps you should try some spelling variations:
doanh tang » doanh sang, doanh tong, doanh thanh
cua triet » cua viet, su triet, va triet
te sach » toc sach
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc va » tuc va, loc va
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x hoi. hieu va cam ((luc va) or (duc va)) doanh tang ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu va cam ((luc va) OR (duc va)) doanh tang ((cua triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu va cam ((luc va) or (duc va)) doanh tang ((cua triet) or (cua te))*.