Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
thieu tach » thien hach, chiet tach, chieu sach
cong quang » thong quang, duong quang, dang quang
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
manh cua » doanh cua, ban cua
toan 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: hoc thieu tach - hanh ((manh cua) or (trung cap)) hang ((cong quang) OR (luong quang)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - hanh ((manh cua) OR (trung cap)) hang ((cong quang) OR (luong quang)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tach - hanh ((manh cua) or (trung cap)) hang ((cong quang) OR (luong quang)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hanh ((manh cua) or (trung cap)) hang ((cong quang) OR (luong quang)) toan ban*.