Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di 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: thu sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam ((duc va) or (tuc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam ((duc va) OR (tuc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam ((duc va) or (tuc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam ((duc va) or (tuc va)) hanh vi cua te*.