Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
luc van » luoc van, luu van, duc van
xuc van » duc van, vuc van, xuc ban
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang ho » nang hoc, nang co, tang ho
ve cam » ve cham, ve cac, va cam
ho lai » o lai
tu san » thu san, tu ban, tu can

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 (tu san)) ky nang ho lai. hieu ve cam ((xuc van) OR (luc van)) thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu san)) ky nang ho lai. hieu ve cam ((xuc van) OR (luc van)) thanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (tu san)) ky nang ho lai. hieu ve cam ((xuc van) OR (luc van)) thanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu san)) ky nang ho lai. hieu ve cam ((xuc van) OR (luc van)) thanh thai cua tre*.