Perhaps you should try some spelling variations:
hoc thien » hoc hien, hoc thiet, hoc tien
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cao » toan ban, toan tap
tinh va » tich va, trinh vat, 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: ((hoc thien) OR (hoc thieu)) hach - nhanh ((tinh va) or (trinh van)) dung cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thien) OR (hoc thieu)) hach - nhanh ((tinh va) OR (trinh van)) dung cong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) OR (hoc thieu)) hach - nhanh ((tinh va) or (trinh van)) dung cong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) OR (hoc thieu)) hach - nhanh ((tinh va) or (trinh van)) dung cong manh toan cao*.