Perhaps you should try some spelling variations:
loai tren » la tren, thai tren
thu sach » tu sach, thuat sach, thuoc sach
dang van » hoang van
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
tuc van » thuc van, truc van, tuc va
xanh di » danh di, vanh dai, xanh tai
cam tuc » cam xuc, cam tu, nam thuc
va cam » va cham, va cac, va cao
anh di » danh di, anh d, anh du

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 ty ((dang van) or (hang va)) hoc. hieu va cam tuc van ((anh di) OR (xanh di)) loai tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((dang van) OR (hang va)) hoc. hieu va cam tuc van ((anh di) OR (xanh di)) loai tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((dang van) or (hang va)) hoc. hieu va cam tuc van ((anh di) OR (xanh di)) loai tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((dang van) or (hang va)) hoc. hieu va cam tuc van ((anh di) OR (xanh di)) loai tren*.