Perhaps you should try some spelling variations:
"tinh quan luan van sang khoa" » "tinh quang luan van sang khoa", "trinh quan luan van sang khoa", "tin quan luan van sang khoa", "tinh quan luan van hang khoa", "tinh quan luan van san khoa", "tinh quan luan van song khoa", "tinh quan luan van nang khoa", "tinh quan luan van sung khoa", "tinh quan lan van sang khoa"
"tin dung quan quan kiem soat" » "tin dung quang quan kiem soat", "tin dung luan quan kiem soat", "tin luong quan quan kiem soat", "tin dung quan quang kiem soat", "tin dung qua quan kiem soat", "tin dung quang tuan kiem soat", "tin dung quan quan niem soat", "tin dung quan quan kien soat", "tin dung quan khuan kiem soat", "tin dung quan quan kiem toan"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("tinh quan luan van sang khoa") or ("tin dung quan quan kiem soat"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tinh quan luan van sang khoa") OR ("tin dung quan quan kiem soat")).
• Removing quotes may allow a broader search: (( tinh quan luan van sang khoa ) or ( tin dung quan quan kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (("tinh quan luan van sang khoa") or ("tin dung quan quan kiem soat"))*.