Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, diep quang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
cap nhung » cam nhung, vap nhung, dap nhung
tung cap » trung cap, cung cap, thong cap
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ho ((chieu sach) or (((hieu quang) or (hieu qua)))) - thanh tung cap nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (((hieu quang) OR (hieu qua)))) - thanh tung cap nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (((hieu quang) or (hieu qua)))) - thanh tung cap nhung cong tac toan cau*.