Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh dai » hanh tai, hanh dao, vanh dai
hieu va » lieu va, hieu qua
cam loc » cam lo
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
loc va » hoc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((nang x) or (dang xay)) hoi. hieu va cam loc va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang x) OR (dang xay)) hoi. hieu va cam loc va hanh dai cua te*.