Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thuat tinh » thuat trinh, thuat kinh, thuat hinh
chua tinh » cua tinh, cha tinh, chua benh
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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: theo ((chua tinh) or (thuat tinh)) - hanh ((tang cua) OR (mang cua)) nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chua tinh) OR (thuat tinh)) - hanh ((tang cua) OR (mang cua)) nhung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chua tinh) or (thuat tinh)) - hanh ((tang cua) OR (mang cua)) nhung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chua tinh) or (thuat tinh)) - hanh ((tang cua) OR (mang cua)) nhung cong tan toan cau*.