Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tinh vai » tinh va, tinh hai, tinh bai
hieu dan » sieu dan, hieu dac, hieu quan
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
cua chu » sua chua

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 ty lang xa hoi. ((hieu dan) OR (hieu van)) dat (nuoc or duoc) va tinh vai cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang xa hoi. ((hieu dan) OR (hieu van)) dat (nuoc OR duoc) va tinh vai cua chu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty lang xa hoi. ((hieu dan) OR (hieu van)) dat (nuoc or duoc) va tinh vai cua chu".
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang xa hoi. ((hieu dan) OR (hieu van)) dat (nuoc or duoc) va tinh vai cua chu*.