Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
xanh dai » vanh dai, xanh tai, lanh dao
xanh di » danh di, vanh dai, xanh tai
xuc van » duc van, luc van, vuc van
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thu hoach)) ky tang ma hoi. hieu ve cham xuc van ((xanh dai) OR (xanh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu hoach)) ky tang ma hoi. hieu ve cham xuc van ((xanh dai) OR (xanh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thu hoach)) ky tang ma hoi. hieu ve cham xuc van ((xanh dai) OR (xanh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu hoach)) ky tang ma hoi. hieu ve cham xuc van ((xanh dai) OR (xanh di)) cua tre*.