Perhaps you should try some spelling variations:
sach kem » hanh kem
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
xuc van » duc van, luc van, vuc van
luu tre » luu tru, cuu tre, luy tre
cao hoi » cau hoi, co hoi, cao hoc
vi luu » vi lua
ve cac » va cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach kem) or (sach y)) nang cao hoi. hieu ((ve cac) or (vien cac)) xuc van hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sach y)) nang cao hoi. hieu ((ve cac) OR (vien cac)) xuc van hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sach y)) nang cao hoi. hieu ((ve cac) or (vien cac)) xuc van hanh vi luu tre*.