Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
cong trong » cong thuong, duong trong, cong trinh
phuong van » phung van, phong van, phuong lan
hoc thieu » toc thieu, hoc hien
trong ung » trong rung, trong dung, trong hung
doc hieu » toc thieu, hoc hien
van tan » van tuan, van ban, van tai
tan ban » toan ban, tang ban, van ban

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) or (hoc thieu)) sang - cong trong ung dung phuong van tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) sang - cong trong ung dung phuong van tan ban*.