Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh luan » khanh luan, hang luan, hanh luat
cong van » cong vang, cong san, song van
van chat » cao chat
luan he » luan che, quan he, luan ve
van hai » van ha, van hanh, van phan

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 luan he thong cong van ((van hai) OR (van chat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh luan he thong cong van ((van hai) OR (van chat))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh luan he thong cong van ((van hai) OR (van chat))*.