Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tieu sang » chieu sang, tieu dung, tiem nang
trung vap » trung cap, trung va, trung lap
trung van » truong van, trong van, trung va
tan nhanh » tai nhanh, tan nhan, tan thanh
nhanh cau » nhanh cay, thanh chau, nhanh ha
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - thanh ((trung vap) OR (trung van)) thong cong tan nhanh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sang - thanh ((trung vap) OR (trung van)) thong cong tan nhanh cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - thanh ((trung vap) OR (trung van)) thong cong tan nhanh cau*.