Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cham xuc » chat xuc, cham soc, pham duc
sach hoi » sach doi, sach moi, cach thoi
xanh di » danh di, vanh dai, xanh tai
va xanh » va danh, va hanh, va anh
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sach o » sach lo, sac o, sach y
di cau » da cau, diem cau

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 o) or (sach hoi)) lang xa hoi. hieu ve ((cham xuc) or (cam xuc)) va xanh di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach o) OR (sach hoi)) lang xa hoi. hieu ve ((cham xuc) OR (cam xuc)) va xanh di cau tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sach o) or (sach hoi)) lang xa hoi. hieu ve ((cham xuc) or (cam xuc)) va xanh di cau tren*.