Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
vap nhung » va nhung, voi nhung, cam nhung
ve nhung » va nhung, tu nhung
cong van » cong vang, cong san, song van
van bao » van ban, van dao
bao cap » cao cap, bao cao, nao cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chiet tach)) - thanh tung ((vap nhung) or (ve nhung)) cong van bao cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chiet tach)) - thanh tung ((vap nhung) OR (ve nhung)) cong van bao cap.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chiet tach)) - thanh tung ((vap nhung) or (ve nhung)) cong van bao cap*.