Perhaps you should try some spelling variations:
hieu va » lieu va, hieu qua
tinh di » tinh doi, trinh di, tinh da
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
va tinh » may tinh
sach ly » sach y, sach lo, sach hay
cac duc » cac du, cao duc, cac dac
di cua » dai cua, doi cua, de 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: thuoc ((sach ly) OR (sach ty)) ((nang xa) or (nang x)) hoi. hieu va cac duc va tinh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ly) OR (sach ty)) ((nang xa) OR (nang x)) hoi. hieu va cac duc va tinh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ly) OR (sach ty)) ((nang xa) or (nang x)) hoi. hieu va cac duc va tinh di cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ly) OR (sach ty)) ((nang xa) or (nang x)) hoi. hieu va cac duc va tinh di cua te*.