Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thuat bang » thuat ban, thuat nang, thuat trang
thuat mang » thuat nang, thuat trang, thuat mieng
hien sach » dien sach, kien sach, thien hach
quang cap » quang chan, quang nam, cung cap
quang cao » nang cao, quang nam
cong van » cong vang, cong san, song van

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 sach - hanh trinh ((thuat bang) OR (thuat mang)) cong van ((quang cap) or (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh trinh ((thuat bang) OR (thuat mang)) cong van ((quang cap) OR (quang cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sach - hanh trinh ((thuat bang) OR (thuat mang)) cong van ((quang cap) or (quang cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - hanh trinh ((thuat bang) OR (thuat mang)) cong van ((quang cap) or (quang cao))*.