Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau tren » cu tren, dau tren, ca tren
thanh ve » hanh ve, thanh va, thanh vien
xuc van » duc van, luc van, vuc van
hieu su » hieu sau, tieu su, hieu so
sach ty » sach y, sach tu, sach thu
so sach » so sanh, bo sach, co sach
lang ha » long ha
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, dieu vu
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) or (lang ha)) hoi. ((hieu vu) OR (hieu su)) cam xuc van thanh ve cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang ha)) hoi. ((hieu vu) OR (hieu su)) cam xuc van thanh ve cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) or (lang ha)) hoi. ((hieu vu) OR (hieu su)) cam xuc van thanh ve cau tren*".