Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hop nhieu » ho chieu, he nhieu, hoc nhiet
hoc thieu » toc thieu, hoc hien
canh sinh » canh tinh, canh binh, tinh sinh
vat thong » va thong, vat trong, mat thong
cong toan » cong tan, cong hoan, cong tuan
toan can » toan ban, toan cao, toan cau
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hop nhieu) OR (hoc thieu)) tang - canh sinh vat thong cong toan can cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hop nhieu) OR (hoc thieu)) tang - canh sinh vat thong cong toan can cau*".