Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lieu tinh » trieu tinh, diep tinh, bien tinh
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
cong van » cong vang, cong san, song van
van thao » van tham, van hao, van than
thao cao » tao cao, thai cao, thao dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (lieu tinh)) - canh tranh ((cua dung) or (qua dung)) cong van thao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (lieu tinh)) - canh tranh ((cua dung) OR (qua dung)) cong van thao cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (lieu tinh)) - canh tranh ((cua dung) or (qua dung)) cong van thao cao*.