Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
trung cam » trung tam, trung cap, trung ca
trung nam » trung tam, trong nam, trung cap
hang cong » dang cong, hang nong, bang cong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
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 xanh) or (chieu sach)) - manh ((trung cam) OR (trung nam)) hang cong hach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sach)) - manh ((trung cam) OR (trung nam)) hang cong hach toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sach)) - manh ((trung cam) OR (trung nam)) hang cong hach toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sach)) - manh ((trung cam) OR (trung nam)) hang cong hach toan cao*.