Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
va cham » va tham
lang ha » long ha
lang xa » dang xay, lang van
xuc va » duc va, tuc va, luc va
de cua » le cua, te cua, dieu cua
cua tu » cua tuc, cua su, cua cu

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

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