Perhaps you should try some spelling variations:
khong duong » khong dung, khong xuong, thong duong
hieu lang » chieu sang, hieu quang, nhieu tang
tuong cua » truong cua, huong cua, thong cua
duong dan » duong dang, huong dan, duong van
thanh lap » thanh san, phan lap, thanh hai
tung cua » trung cua, dung cua, tang cua
toan ban » van ban
he hieu » he nhieu, he dieu, de hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: he hieu lang - thanh ((tung cua) OR (tuong cua)) khong duong dan ((thanh lap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he hieu lang - thanh ((tung cua) OR (tuong cua)) khong duong dan ((thanh lap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "he hieu lang - thanh ((tung cua) OR (tuong cua)) khong duong dan ((thanh lap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: he hieu lang - thanh ((tung cua) OR (tuong cua)) khong duong dan ((thanh lap) or (toan ban))*.