Perhaps you should try some spelling variations:
lang thai » lang chai, dang thai, lang hai
thu hien » thuc hien, thi hien, thua thien
sach ty » sach tu, sach thu, xach tay
su hien » su kien, su tien, nhu hien
va lang » va nang, hoa lang
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
cam thu » nam thu, cac thu, ca thu
va cam » va cham, va cac, va cao
thu va » thuc va, thue va, tu va

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) or (sach y)) xang xa hoi. hieu va cam thu va lang thai ((su hien) OR (thu hien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) xang xa hoi. hieu va cam thu va lang thai ((su hien) OR (thu hien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) xang xa hoi. hieu va cam thu va lang thai ((su hien) OR (thu hien))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) xang xa hoi. hieu va cam thu va lang thai ((su hien) OR (thu hien))*.