Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tri » thanh tri, hanh tai, hanh trinh
than luc » nhan luc, than duc, thanh luu
bo sach » co sach, hoc sach
va hanh » van hanh, va thanh, va danh
hac luc » nhan luc
sach ty » sach y, sach tu, sach thu
mang xa » lang xa, mang may, dang xay
xang xa » lang xa, ang xa, dang xay
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ty ((xang xa) or (mang xa)) hoi. hieu van ((hac luc) OR (than luc)) va hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty ((xang xa) OR (mang xa)) hoi. hieu van ((hac luc) OR (than luc)) va hanh tri cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ty ((xang xa) or (mang xa)) hoi. hieu van ((hac luc) OR (than luc)) va hanh tri cua tre*".