Perhaps you should try some spelling variations:
thuat tach » thuat sach, thuat tac, thuat thanh
thuat mach » thuat sach, thuyet mach, thuat lanh
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
cong van » cong vang, cong san, song van
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((((thuat tach) OR (thuat mach))) or (chiet tach)) - hanh trinh quan nhung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((thuat tach) OR (thuat mach))) OR (chiet tach)) - hanh trinh quan nhung cong van van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((thuat tach) OR (thuat mach))) or (chiet tach)) - hanh trinh quan nhung cong van van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((((thuat tach) OR (thuat mach))) or (chiet tach)) - hanh trinh quan nhung cong van van ban*.