Perhaps you should try some spelling variations:
tinh hai » tinh thai, tinh chat, trinh han
thu hang » thi hang, thuc hanh, thu huong
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cua triet, dua tren
va tinh » may tinh
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
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 ((ty hang) or (thu hang)) xa hoi. hieu va cam duc va tinh hai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty hang) OR (thu hang)) xa hoi. hieu va cam duc va tinh hai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty hang) or (thu hang)) xa hoi. hieu va cam duc va tinh hai ((cua tre) or (cuu tre))*.