Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
lua tre » cua tre, luy tre, dua tren
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
vi lua » vi luu

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 (thuoc sach)) ky lang xa hoi. ((hieu ve) OR (hieu van)) chat xuc va hanh vi lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky lang xa hoi. ((hieu ve) OR (hieu van)) chat xuc va hanh vi lua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuoc sach)) ky lang xa hoi. ((hieu ve) OR (hieu van)) chat xuc va hanh vi lua tre*".