Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lang van » dang van, tang van, hoang van
cham xuc » chat xuc, cham soc, pham duc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay
ca tren » cau tren, cu tren, la tren
sach o » sach lo, sac o, sach y
va dao » ca dao
dao di » dao do, dao du, dao li
di ca » di cau, di cua, doi ca

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 o ((lang xa) OR (lang van)) hoi. hieu ve ((cham xuc) or (cam xuc)) va dao di ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach o ((lang xa) OR (lang van)) hoi. hieu ve ((cham xuc) OR (cam xuc)) va dao di ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach o ((lang xa) OR (lang van)) hoi. hieu ve ((cham xuc) or (cam xuc)) va dao di ca tren".
• Adding a wildcard symbol may retrieve word variants: thu sach o ((lang xa) OR (lang van)) hoi. hieu ve ((cham xuc) or (cam xuc)) va dao di ca tren*.