Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
tuong cong » truong cong, trong cong, tong cong
trinh toan » tinh toan, thanh toan, trinh han
trung can » trung van, trong can, trung ca
trung cap » truong cao, trung tam
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: toc thieu sach - thanh ((trung can) or (trung cap)) tuong cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh ((trung can) OR (trung cap)) tuong cong trinh toan cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh ((trung can) or (trung cap)) tuong cong trinh toan cau*.