Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
thuc dann » thuoc dang, thuc hanh, thuc day
va triet » va thiet, va trien, ve triet
thuc dan » thuc hanh, hoc dan, thuc vat
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
dieu va » dieu van, lieu va, dien va
ve cac » va cac, vien cac

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) OR (sach y)) nang xa hoi. hieu ve cac ((thuc dann) or (thuc dan)) hanh dieu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach y)) nang xa hoi. hieu ve cac ((thuc dann) OR (thuc dan)) hanh dieu va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sach y)) nang xa hoi. hieu ve cac ((thuc dann) or (thuc dan)) hanh dieu va triet*".