Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, xuc ban
su tien » su kien, su hien, tu tieng
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sach v » sach va, sach 2, sach vay
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
vi su » va su, ve su, ki su

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

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