Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
dao dinh » do dinh, dao minh, dao tinh
thuc can » thuc chan, thuc dan, thuc van
dinh ca » dinh cac, dinh cua, dinh cao
thuc ca » thuc cua, thuc cao, thuc va
ca tren » cau tren, cu tren, la tren
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
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: nuoc sach ky ((tang ma) or (nang cao)) hoi. hieu ve cac ((thuc ca) OR (thuc can)) dao dinh ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ky ((tang ma) OR (nang cao)) hoi. hieu ve cac ((thuc ca) OR (thuc can)) dao dinh ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ky ((tang ma) or (nang cao)) hoi. hieu ve cac ((thuc ca) OR (thuc can)) dao dinh ca tren".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky ((tang ma) or (nang cao)) hoi. hieu ve cac ((thuc ca) OR (thuc can)) dao dinh ca tren*.