Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tinh lai » tinh lao, tinh hai, minh lai
sach ty » sach y, sach tu, sach thu
va tinh » may tinh
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu ((ve cac) or (vien bach)) xuc va tinh lai ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cac) OR (vien bach)) xuc va tinh lai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cac) or (vien bach)) xuc va tinh lai ((cua tre) or (cau tren))*.