Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
hanh thang » nhanh thang, hanh trang, danh thang
gian hieu » gian viet, van hieu, tin hieu
tong cong » trong cong, cong cong, dung cong
nha hieu » nha dieu, nghe hieu, phan hieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
he tong » he thong, he trong, he cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nha hieu) or (gian hieu)) lang - ((hanh thang) OR (thanh thang)) he tong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nha hieu) OR (gian hieu)) lang - ((hanh thang) OR (thanh thang)) he tong cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nha hieu) or (gian hieu)) lang - ((hanh thang) OR (thanh thang)) he tong cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((nha hieu) or (gian hieu)) lang - ((hanh thang) OR (thanh thang)) he tong cong dan toan cao*.