Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh thang » nhanh thang, thanh thanh, thanh toan
phuong cong » phuong dong, phong cong, phung cong
thanh hang » thanh hoang, tranh hang, thanh hung
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
cong san » cong tac
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu quang - ((thanh thang) or (thanh hang)) va phuong cong san ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - ((thanh thang) OR (thanh hang)) va phuong cong san ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - ((thanh thang) or (thanh hang)) va phuong cong san ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - ((thanh thang) or (thanh hang)) va phuong cong san ((toan cao) OR (toan tap))*.