Perhaps you should try some spelling variations:
sinh thai » dinh thi
tinh hai » tinh thai, tinh chat, trinh han
thi hang » thi hanh, thi nang, thi hong
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
tu hang » thu hang, tu hanh, tu hung
va cam » va cham, va cac, va cao

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 ((tu hang) or (thi hang)) xa hoi. hieu va cam duc va ((tinh hai) or (sinh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu hang) OR (thi hang)) xa hoi. hieu va cam duc va ((tinh hai) OR (sinh thai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu hang) or (thi hang)) xa hoi. hieu va cam duc va ((tinh hai) or (sinh thai)) cua tre*.