Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
nang co » nang cao, nang doc, nang noi
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
tuc va » truc va, tuc xa, duc va
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau

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 ky nang co hoc. hieu ve chat ((tuc va) OR (thuc va)) hanh ((ve cau) or (va cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang co hoc. hieu ve chat ((tuc va) OR (thuc va)) hanh ((ve cau) OR (va cau)) tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoc. hieu ve chat ((tuc va) OR (thuc va)) hanh ((ve cau) or (va cau)) tren*".