Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
hanh doan » hanh doanh, thanh toan, thinh doan
cong tac » cong ty
tren cau » tren cay, tren tau, trinh cau
doan he » toan he, dan he, doan thi
tren ca » tren cay, tren co, tren c

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 - hanh doan he thong cong tac ((tren cau) OR (tren ca))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - hanh doan he thong cong tac ((tren cau) OR (tren ca))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - hanh doan he thong cong tac ((tren cau) OR (tren ca))*.