Perhaps you should try some spelling variations:
thien van » thi van
sach ty » sach y, sach tu, sach thu
tinh di » tinh doi, trinh di, tinh da
va tinh » may tinh
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang xa) OR (nang ma)) hoi. thien van dao (nuoc or quoc) va tinh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang ma)) hoi. thien van dao (nuoc OR quoc) va tinh di cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) OR (nang ma)) hoi. thien van dao (nuoc or quoc) va tinh di cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) OR (nang ma)) hoi. thien van dao (nuoc or quoc) va tinh di cua tu*.