Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
lang van » dang van, tang van, hoang van
tinh dao » trinh dao, tinh lao, tinh da
cau theo » cau thi, cau tao
cam duc » cam xuc, cao duc, pham duc
va tinh » may tinh
lang xa » lang ha, dang xay
dao cau » dat cau, da cau, tao cau
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y ((lang xa) OR (lang van)) hoi. ((hieu ve) or (lieu va)) cam duc va tinh dao cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y ((lang xa) OR (lang van)) hoi. ((hieu ve) OR (lieu va)) cam duc va tinh dao cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y ((lang xa) OR (lang van)) hoi. ((hieu ve) or (lieu va)) cam duc va tinh dao cau theo".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y ((lang xa) OR (lang van)) hoi. ((hieu ve) or (lieu va)) cam duc va tinh dao cau theo*.