Perhaps you should try some spelling variations:
thuong gian » truong giang, phuong giang, khong gian
thanh tung » thanh cong
chieu sang » chieu sach, chieu xanh, hieu lang
cap thuong » chap thuong, ca thuong, cao thuong
hieu van » hieu va, thien van, lieu va
tung cap » trung cap, cung cap, thong cap
gian dan » gian lang
van chat » cao chat
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu van)) - thanh tung cap thuong gian dan van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu van)) - thanh tung cap thuong gian dan van chat*.