Perhaps you should try some spelling variations:
sach tranh » canh tranh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
tieu sang » chieu sang, tieu dung, tiem nang
cua nhung » va nhung
cong van » cong vang, cong san, song van
dong tai » dung tai, luong tai, cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - ((sach tranh) or (hanh trinh)) cua nhung cong van dong tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - ((sach tranh) OR (hanh trinh)) cua nhung cong van dong tai.
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - ((sach tranh) or (hanh trinh)) cua nhung cong van dong tai*.