Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sach thu » sach thue, sach thieu, sach tham
van hanh » ban hanh, van anh, van ban
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach thu)) nang xa hoi. hieu va cam xuc ((van hanh) OR (van thanh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang xa hoi. hieu va cam xuc ((van hanh) OR (van thanh)) di cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) nang xa hoi. hieu va cam xuc ((van hanh) OR (van thanh)) di cuu tre*".