Perhaps you should try some spelling variations:
nhanh cong » nhanh chong, thanh cong, nganh cong
hieu lang » chieu sang, hieu quang, nhieu tang
cong thai » cong hai, hong thai, cong thanh
thai dung » thai duong, thai vung, thi dung
dung cong » dung trong
hieu van » hieu va, thien van, lieu va
cong van » cong vang, cong san, song van
van hang » van khang, van hoang, van thang
hang ca » hang va, nang cao, hang tai

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 van) or (hieu lang)) - nhanh cong thai dung cong van hang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu van) OR (hieu lang)) - nhanh cong thai dung cong van hang ca.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu van) or (hieu lang)) - nhanh cong thai dung cong van hang ca*.