Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong van » cong vang, cong san, song van
van quan » van ban
quan ha » quan he

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh ((trung va) or (trung ha)) thong cong van quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((trung va) OR (trung ha)) thong cong van quan ha.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((trung va) or (trung ha)) thong cong van quan ha*.