Perhaps you should try some spelling variations:
phuong dinh » phuong binh, phuong linh, phuong trinh
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » hanh trinh, hanh trang, lanh tranh
toi phuong » thi phuong, tai phuong, doi phuong
hoc thieu » toc thieu, hoc hien
toan cao » toan tap
toan ban » van ban
cua toi » cua hoi, cua moi, cua loai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh tranh) OR (canh tranh)) cua toi phuong dinh ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh tranh) or (canh tranh)) cua toi phuong dinh ((toan cao) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh tranh) or (canh tranh)) cua toi phuong dinh ((toan cao) OR (toan ban))*.