Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
tien thanh » tien thinh, tran thanh, den thanh
tang luan » dung luan
luan hanh » luan thanh, luan han, luan danh
hanh cong » thanh cong, hang cong, hanh dong
manh toan » thanh toan, tinh toan
anh tang » anh bang, anh dang, anh nang

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 tinh) or (tien thanh)) - anh tang luan hanh cong ((manh toan) OR (anh tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (tien thanh)) - anh tang luan hanh cong ((manh toan) OR (anh tuan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (tien thanh)) - anh tang luan hanh cong ((manh toan) OR (anh tuan)) cau*".