Perhaps you should try some spelling variations:
duong manh » duong van
trinh vat » trinh luat, sinh vat, trinh han
trinh van » trinh han, trinh quan, trinh toan
manh toan » thanh toan, anh tuan, tinh toan
chi xanh » chi anh, chi danh, chi hanh
toan cao » toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh ((tich va) or (((trinh vat) or (trinh van)))) tuong duong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh ((tich va) OR (((trinh vat) OR (trinh van)))) tuong duong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh ((tich va) or (((trinh vat) or (trinh van)))) tuong duong manh toan cao*.