Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham luu » cham cuu, chat lua, phap luu
van hanh » van thanh, ban hanh, van anh
luu tre » luu tru, cuu tre, luy tre
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
vi luu » vi lua
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky ((nang xa) or (tang ma)) hoi. hieu va cham luu ((van hanh) or (ban thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((nang xa) OR (tang ma)) hoi. hieu va cham luu ((van hanh) OR (ban thanh)) vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te cac ky ((nang xa) or (tang ma)) hoi. hieu va cham luu ((van hanh) or (ban thanh)) vi luu tre*.