Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
chinh sua » chinh su, chinh cua, chinh luan
cong van » cong vang, cong san, song van
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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 sang - hanh ((chinh sua) or (trinh luan)) thong cong van ((phan cau) OR (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((chinh sua) OR (trinh luan)) thong cong van ((phan cau) OR (phan cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh ((chinh sua) or (trinh luan)) thong cong van ((phan cau) OR (phan cac))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((chinh sua) or (trinh luan)) thong cong van ((phan cau) OR (phan cac))*.