Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
lang van » dang van, tang van, hoang van
hanh de » hanh ve, hanh kem
xuc van » duc van, luc van, vuc van
va chat » van chat, va phat, cao chat
va tham » van tham, va cham, va thanh
lang xa » lang ha, dang xay
de cua » le cua, te cua, dieu cua
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach thieu ((lang xa) OR (lang van)) hoi. hieu ((va tham) or (va chat)) xuc van hanh de cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach thieu ((lang xa) OR (lang van)) hoi. hieu ((va tham) OR (va chat)) xuc van hanh de cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach thieu ((lang xa) OR (lang van)) hoi. hieu ((va tham) or (va chat)) xuc van hanh de cua cu".
• Adding a wildcard symbol may retrieve word variants: hoc sach thieu ((lang xa) OR (lang van)) hoi. hieu ((va tham) or (va chat)) xuc van hanh de cua cu*.