Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach thu » sach thue, sach thieu, sach tham
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
hieu ve » hieu va, hieu van
sach tu » cach tu, sach ty, sach uu
lang xa » lang ha, dang xay, lang van
ve cam » ve cham, ve cac, va cam

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 tu) OR (sach thu)) lang xa hoi. hieu ve cam tuc ban thanh ((le cua) or (ly cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach thu)) lang xa hoi. hieu ve cam tuc ban thanh ((le cua) OR (ly cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach thu)) lang xa hoi. hieu ve cam tuc ban thanh ((le cua) or (ly cua)) vat".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (sach thu)) lang xa hoi. hieu ve cam tuc ban thanh ((le cua) or (ly cua)) vat*.