Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
chinh cau » chinh chau, chinh ca, chinh can
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong can » cong san, cong tan, cong dan
can cau » van cau, ban cau, ca cau

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 - hanh ((trung va) or (trang va)) thong cong can ((can cau) or (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trung va) OR (trang va)) thong cong can ((can cau) OR (chinh cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trung va) or (trang va)) thong cong can ((can cau) or (chinh cau))*.