Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
thanh bac » nhanh bac, thanh bai, thanh san
tung cay » tuong cay, rung cay, tung bay
dung cay » dung cac, dung may, dung cam
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, khoan cam

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 - thanh ((tung cay) OR (dung cay)) trong cong tan ((khan cap) or (thanh bac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((tung cay) OR (dung cay)) trong cong tan ((khan cap) OR (thanh bac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((tung cay) OR (dung cay)) trong cong tan ((khan cap) or (thanh bac))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((tung cay) OR (dung cay)) trong cong tan ((khan cap) or (thanh bac))*.