Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
tuc ban » thuc ban, truc ban, tu ban
hanh ve » hanh vi, hanh va, hanh kem
te sach » toc sach
lang ha » long ha
hanh le » thanh le, hanh de, manh le
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
ve cac » va cac, vien cac
ha hoi » hoa hoi, ha noi, xa hoi
y lang » o lang, _ lang, tay lang

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) or (te sach)) y lang ha hoi. hieu ve cac tuc ban ((hanh le) or (hanh ve)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y lang ha hoi. hieu ve cac tuc ban ((hanh le) OR (hanh ve)) cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y lang ha hoi. hieu ve cac tuc ban ((hanh le) or (hanh ve)) cua vat*.