Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
lang ha » long ha
sach ky » sac ky, sach y, sach ty
lang xa » dang xay, lang van
van cam » van lam, van cau, van dam
loc gia » luoc gia, toc gia, hoc gia
su sach » so sach, vu sach
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((lang xa) OR (lang ha)) hoi. hieu ((van cam) or (van nam)) loc gia thanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (lang ha)) hoi. hieu ((van cam) OR (van nam)) loc gia thanh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) OR (lang ha)) hoi. hieu ((van cam) or (van nam)) loc gia thanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) OR (lang ha)) hoi. hieu ((van cam) or (van nam)) loc gia thanh vi cau tren*.