Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
thanh tung » thanh cong
tung cap » trung cap, cung cap, thong cap
cap dong » cao dong, cau dong, ca dong
cong tam » cong tac, cong tan, dong tam
cong nam » dong nam, uong nam, thong nam
toan cau » toan cao, toan ban, toan tap

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

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