Perhaps you should try some spelling variations:
hoang van » hang va
thanh de » hanh de, thanh ve, thanh do
va thanh » gia thanh, ban thanh, va tinh
lang van » dang van, tang van, giang van
sach ky » sac ky, sach ty, sach kem
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua
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: tu ((sach ky) or (sach y)) ((lang van) OR (hoang van)) hoc. hieu va cam luc va thanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) ((lang van) OR (hoang van)) hoc. hieu va cam luc va thanh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) ((lang van) OR (hoang van)) hoc. hieu va cam luc va thanh de cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) ((lang van) OR (hoang van)) hoc. hieu va cam luc va thanh de cua te*.