Perhaps you should try some spelling variations:
truong phuong » truong chung, truong trung, dung phuong
phuong van » phung van, phong van, phuong lan
hieu lang » chieu sang, hieu quang, nhieu tang
csinh cua » chinh cua, tinh cua, trinh cua
doi hieu » doi chieu, doc hieu, doi hien
sinh cua » manh cua, dinh cuu, sinh va
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh ((csinh cua) or (sinh cua)) truong phuong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh ((csinh cua) OR (sinh cua)) truong phuong van toan cao*.