Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu ((ve cam) or (ve cac)) tuc ((ban hanh) or (va danh)) ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) tuc ((ban hanh) OR (va danh)) ve su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu ((ve cam) or (ve cac)) tuc ((ban hanh) or (va danh)) ve su triet*.