Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
da thanh » dao thanh, dat thanh, dam thanh
sach van » sach han, sach va, bach van
su sach » so sach, vu sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
thuc da » thuc dan, thuc day, thuc dia
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
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: su sach van ((nang xa) or (nang ma)) hoi. hieu ((ve cac) or (va cam)) thuc da thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van ((nang xa) OR (nang ma)) hoi. hieu ((ve cac) OR (va cam)) thuc da thanh di cua te.
• Adding a wildcard symbol may retrieve word variants: su sach van ((nang xa) or (nang ma)) hoi. hieu ((ve cac) or (va cam)) thuc da thanh di cua te*.