Perhaps you should try some spelling variations:
gianh lai » gian lan
toc sach » hoc sach, doc sach, thuoc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
sach ky » sac ky, sach y, sach ty
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
loc va » hoc va
luc va » duc va
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky dang xa hoi. hieu va cau ((((luc va) OR (loc va))) or (tuc va)) gianh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky dang xa hoi. hieu va cau ((((luc va) OR (loc va))) OR (tuc va)) gianh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky dang xa hoi. hieu va cau ((((luc va) OR (loc va))) or (tuc va)) gianh lai cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ky dang xa hoi. hieu va cau ((((luc va) OR (loc va))) or (tuc va)) gianh lai cua te*.