Perhaps you should try some spelling variations:
"ki nang quang uan hieu so" » "ki nang quan uan hieu so", "ki dang quang uan hieu so", "ki hang quang uan hieu so", "ki nang quang tuan hieu so", "ki nang quang ban hieu so", "ki nang quang tran hieu so", "ki nang quang luan hieu so", "ki nang quang van hieu so", "ki nang quang luan tieu so", "ky nang quang uan hieu so", "ki nang quang uan thieu so"
"trinh dung quang hai diem sai" » "trinh dang quang hai diem sai", "trinh dung quan hai diem sai", "trinh luong quang hai diem sai", "trinh dung quang khai diem sai", "trinh dung quang thai diem sai", "trinh dung quang hoi diem sai", "trinh dung quang dac diem sai", "trinh dung quang hai lien sai", "trinh dung quang mai dien sai", "trinh dung quang hai dieu sai", "trinh dung quang hai niem sai", "trinh dung quang hai diem cau"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("ki nang quang uan hieu so") or ("trinh dung quang hai diem sai"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ki nang quang uan hieu so") OR ("trinh dung quang hai diem sai"))*.
• Removing quotes may allow a broader search: (( ki nang quang uan hieu so ) or ( trinh dung quang hai diem sai ))*.