Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
sach dao » lanh dao
hoang xa » hoang ha, hoang va, hoang xuan
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
sach lo » sach doi, sach hoi, sach moi
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, luc va
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: tu ((sach lo) OR (sach dao)) hoang xa hoi. ((hieu va) or (thien van)) cam xuc va dinh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach dao)) hoang xa hoi. ((hieu va) OR (thien van)) cam xuc va dinh vi cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) OR (sach dao)) hoang xa hoi. ((hieu va) or (thien van)) cam xuc va dinh vi cau tren*".