Perhaps you should try some spelling variations:
duong manh » duong van
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, doi chieu, mot chieu
toan cao » toan ban, toan tap
tinh va » tich va, trinh van, tinh gia

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sang - nhanh ((tinh va) or (trinh vat)) tuong duong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sang - nhanh ((tinh va) OR (trinh vat)) tuong duong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sang - nhanh ((tinh va) or (trinh vat)) tuong duong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sang - nhanh ((tinh va) or (trinh vat)) tuong duong manh toan cao*.