Perhaps you should try some spelling variations:
sach tham » sach nha
sach tac » sach bac, sach tai, sach truc
tinh hai » tinh thai, tinh chat, trinh han
manh hai » lanh hai, minh hai, thanh hai
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
quan xa » quan ha, quan va, quan cua
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, va cam

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 tac) OR (sach tham)) quan xa hoi. hieu ve cam xuc va ((manh hai) or (tinh hai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tac) OR (sach tham)) quan xa hoi. hieu ve cam xuc va ((manh hai) OR (tinh hai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tac) OR (sach tham)) quan xa hoi. hieu ve cam xuc va ((manh hai) or (tinh hai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tac) OR (sach tham)) quan xa hoi. hieu ve cam xuc va ((manh hai) or (tinh hai)) cuu tre*.