Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, tinh hai
tu sach » thu sach, su sach, te sach
cuc tre » cua tre, cuu tre, cuc thue
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
mau hoi » mai hoi, mau ho, mau hop
ky dang » ky nang, ky danh
duc tre » duoc tren, duc tien
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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