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