Perhaps you should try some spelling variations:
trang luan » tang luan, tranh luan, truong luan
trang tuan » tran tuan, trung tuan, trong tuan
thong cong » trong cong, tong cong, thong thong
chua tinh » cua tinh, cha tinh, thuat tinh
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
chu tinh » chau tinh, cuu tinh, chu tich
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: hoi ((chu tinh) OR (chua tinh)) - hanh ((trang luan) or (trang tuan)) thong cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((chu tinh) OR (chua tinh)) - hanh ((trang luan) OR (trang tuan)) thong cong vang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi ((chu tinh) OR (chua tinh)) - hanh ((trang luan) or (trang tuan)) thong cong vang toan cau".
• Adding a wildcard symbol may retrieve word variants: hoi ((chu tinh) OR (chua tinh)) - hanh ((trang luan) or (trang tuan)) thong cong vang toan cau*.