Perhaps you should try some spelling variations:
tinh hai » tinh thai, tinh chat, trinh han
tu sach » thu sach, su sach, te sach
hai cuu » hai cua, hai chu, hai cuc
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
lao va » tao va, cao va, bao va

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