Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
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: hoc ((((chieu sach) or (hieu lang))) or (trieu tinh)) - hanh trung cua nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sach) OR (hieu lang))) OR (trieu tinh)) - hanh trung cua nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) or (hieu lang))) or (trieu tinh)) - hanh trung cua nhung cong tac toan cau*.