Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
chi sach » chinh sach, chieu sach, co sach
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
doi chi » doi khi

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 sach - hanh ((trung cua) or (trung cap)) ((nhung cong) OR (thong cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - hanh ((trung cua) OR (trung cap)) ((nhung cong) OR (thong cong)) dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - hanh ((trung cua) or (trung cap)) ((nhung cong) OR (thong cong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: doi chi sach - hanh ((trung cua) or (trung cap)) ((nhung cong) OR (thong cong)) dan than cao*.