Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
thi van » thi lan, thi hanh, thi nang
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
luu tre » luu tru, cuu tre, luy tre
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
xuc va » duc va, tuc va, luc va
y hang » ly hang, ty hang, yu hang
vi luu » vi lua

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) OR (thu sach)) y hang xa hoi. ((hieu va) or (thi van)) cam xuc va dinh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y hang xa hoi. ((hieu va) OR (thi van)) cam xuc va dinh vi luu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y hang xa hoi. ((hieu va) or (thi van)) cam xuc va dinh vi luu tre*".