Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chong cong » cong cong, thong cong, cuong cong
lang thanh » dang thanh, tang thanh, lang thang
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
cong lang » cong vang, cong luong, cong quang
thanh cau » thanh chau, thanh mau, nhanh cau
tung cap » cung cap, thong cap, trong cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) or (thieu khang)) - thanh ((tung cap) or (trung cap)) chong cong lang thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (thieu khang)) - thanh ((tung cap) OR (trung cap)) chong cong lang thanh cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (thieu khang)) - thanh ((tung cap) or (trung cap)) chong cong lang thanh cau*.