Perhaps you should try some spelling variations:
truong van » trong van, truong va, truong dai
hieu sang » chieu sang, hieu lang, hieu quang
trinh han » trinh quan
doc hieu » toc thieu, hoc thieu, hoc hien
tap danh » tac danh, tao danh, tap dan
danh bao » doanh bao, danh bat, dan bao
van tap » van tai, van tan, han tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - hanh ((tinh chat) or (trinh han)) truong van tap danh bao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh ((tinh chat) OR (trinh han)) truong van tap danh bao.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - hanh ((tinh chat) or (trinh han)) truong van tap danh bao*.