Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
tinh nang » trinh nang, tin nang, tich nang
trong tan » trong quan, trong cac, trong ca
hoc hieu » hoc thieu, hoc hien, doc hieu
tan toan » tan tran, tap toan, van toan
toan ban » van ban
nang su » dang su, nang du, nang tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu quang - tinh nang su dung trong tan toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu quang - tinh nang su dung trong tan toan ban*.