Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh trinh » canh tranh, hanh trinh, canh tinh
mang thong » mang trong, hang thuong, dang thuong
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
mat thong » suat thong, xuat thong, va thong
san cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tinh - canh trinh ((mat thong) or (mang thong)) cong thanh san cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh trinh ((mat thong) OR (mang thong)) cong thanh san cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh trinh ((mat thong) or (mang thong)) cong thanh san cau*.