Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
thuc van » thuc vat, thuc dan, thuc va
thanh ve » hanh ve, thanh va, thanh vien
ky tang » ky nang, ky dang, kho tang
van hoe » van hoc, van hieu, van hien
sach ky » sac ky, sach y, sach ty
ve phat » va phat, te phat, de phat
ve cua » le cua, de cua, te cua
v pham » vi pham, d pham
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky tang ((van hoe) OR (van hoa)). hieu ((v pham) or (ve phat)) thuc van thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky tang ((van hoe) OR (van hoa)). hieu ((v pham) OR (ve phat)) thuc van thanh ve cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky tang ((van hoe) OR (van hoa)). hieu ((v pham) or (ve phat)) thuc van thanh ve cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky tang ((van hoe) OR (van hoa)). hieu ((v pham) or (ve phat)) thuc van thanh ve cua te*.