Perhaps you should try some spelling variations:
"te hoach quang nghiem ad hoc" » "te hoach luan nghien ad hoc", "te hoach huong nghiep ad hoc", "te hoach quang ngai ad hoc", "te doanh quang nghiem ad hoc", "te hoach bang nghiem ad hoc", "te hoach luan nghiem ad hoc", "te hoach quang nghiem d hoc", "te hoach quang nghiem ban hoc", "te hoach quang nghiem lam hoc", "ke hoach quang nghiem ad hoc", "thu hoach quang nghiem ad hoc", "te hoc quang nghiem ad hoc"
"thu sach tai nghiep dan hoc" » "thu sach mai nghiep dan hoc", "thu sach tac nghiep dan hoc", "thu sach trai nghiem dan hoc", "thu sach tai nghiep can hoc", "thu sach tai nghiep dai hoc", "thu sach tai nghiep van hoc", "tu sach tai nghiep dan hoc", "thuat sach tai nghiep dan hoc", "thuoc sach tai nghiep dan hoc", "thu sach bai nghiep dan hoc", "thu sach tham nghiep dan hoc", "thu sach dao nghiep dan hoc", "thu sach tai nghiep dan toc"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("te hoach quang nghiem ad hoc") or ("thu sach tai nghiep dan hoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("te hoach quang nghiem ad hoc") OR ("thu sach tai nghiep dan hoc")).
• Removing quotes may allow a broader search: (( te hoach quang nghiem ad hoc ) or ( thu sach tai nghiep dan hoc )).
• Adding a wildcard symbol may retrieve word variants: (("te hoach quang nghiem ad hoc") or ("thu sach tai nghiep dan hoc"))*.