Perhaps you should try some spelling variations:
thanh tung » thanh cong
nong thong » nong thon, dong thong, cong thong
hieu lang » chieu sang, hieu quang, nhieu tang
thong dan » thong van, tuong dan, thong den
thanh cac » hanh cac, thanh bac, thanh ca
tung cua » trung cua, tuong cua, dung cua
cua nong » cua cong, cuu nong, cua dong
khan cap » khan ap, than cap, khoan cam
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh tung cua nong thong dan ((thanh cac) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tung cua nong thong dan ((thanh cac) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung cua nong thong dan ((thanh cac) or (khan cap))*.