Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
ngang tuan » hoang tuan, trang tuan, nganh quan
nganh toan » nganh thanh, thanh toan, manh toan
quang tuan » quang thanh, quan luan, quang cua
hieu lang » chieu sang, hieu quang, nhieu tang
hanh hang » thanh hang, hang hang, hanh han
doi hieu » doi chieu, doc hieu, doi hien
va thong » va thuong, va phuong, he thong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh hang va thong cong ((((ngang tuan) OR (nganh toan))) or (quang tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh hang va thong cong ((((ngang tuan) OR (nganh toan))) OR (quang tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - hanh hang va thong cong ((((ngang tuan) OR (nganh toan))) or (quang tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh hang va thong cong ((((ngang tuan) OR (nganh toan))) or (quang tuan)) cau*.