Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
va chua » vua chua, ca chua, va chu
va cua » via cua, ca cua, ma cua
ve am » va am

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