Perhaps you should try some spelling variations:
hoat viet » hoa viet, hoai viet, khoan viet
voi hoat » toi hoat, doi hoat, vo hoat
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((nang xa) or (dang xay)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) voi hoat viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (dang xay)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) voi hoat viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang xa) or (dang xay)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) voi hoat viet".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (dang xay)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) voi hoat viet*.