Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
dang cong » dung cong
trinh ve » trinh he, trinh vi, trinh viet
trinh va » trinh van, trinh vat, trinh vi
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat tu » phan tu, pham tu, phap tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien nhanh - canh ((trinh ve) or (trinh va)) dang cong tac phat tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - canh ((trinh ve) OR (trinh va)) dang cong tac phat tu.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - canh ((trinh ve) or (trinh va)) dang cong tac phat tu*.