Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
thong cong » trong cong, tong cong, thong thong
trinh han » trinh quan
cong toan » cong tan, cong hoan, cong tuan
he nhieu » hop nhieu, phu nhieu, he dieu
toan ban » van ban
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: he nhieu tang - canh ((trinh han) or (sinh vat)) thong cong toan ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he nhieu tang - canh ((trinh han) OR (sinh vat)) thong cong toan ban cau.
• Adding a wildcard symbol may retrieve word variants: he nhieu tang - canh ((trinh han) or (sinh vat)) thong cong toan ban cau*.