Perhaps you should try some spelling variations:
nang van » dang van, tang van, lang van
hanh di » hanh vi, hanh de, hang di
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sach y)) nang van hoa. hieu ve cam ((luc va) or (tuc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang van hoa. hieu ve cam ((luc va) OR (tuc va)) hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) nang van hoa. hieu ve cam ((luc va) or (tuc va)) hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) nang van hoa. hieu ve cam ((luc va) or (tuc va)) hanh di cua tre*.