Perhaps you should try some spelling variations:
"su sach trien nghiep va hoc" » "su sach trinh nghien va hoc", "su sach vien nghien va hoc", "su sach bien nghien va hoc", "su sach tien nghiep va hoc", "su sach tren nghiep va hoc", "su sach thieu nghiep va hoc", "su sach trien nghiep vu hoc", "so sach trien nghiep va hoc", "vu sach trien nghiep va hoc", "su sach trien nghiep van hoc"
"toc sach kinh nghiep ban hoc" » "toc sach kinh nghiem ban hoc", "toc sach doanh nghiep ban hoc", "toc sach trinh nghien ban hoc", "toc sach kinh nghiep bang hoc", "toc sach kinh nghiep bao hoc", "hoc sach kinh nghiep ban hoc", "doc sach kinh nghiep ban hoc", "thuoc sach kinh nghiep ban hoc", "toc sach kinh nghiep van hoc", "toc sach kinh nghiep bai hoc"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("su sach trien nghiep va hoc") or ("toc sach kinh nghiep ban hoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach trien nghiep va hoc") OR ("toc sach kinh nghiep ban hoc"))*.
• Removing quotes may allow a broader search: (( su sach trien nghiep va hoc ) or ( toc sach kinh nghiep ban hoc ))*.