Perhaps you should try some spelling variations:
tich tinh » tich lich
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tinh cua » trinh cua, sinh cua, tinh chat
nang xa » nang x, lang xa, nang ma
nam mua » nam qua, nam xua, nam luat
va tich » va tinh, va dich
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (thu sach)) ky nang xa hoi. hieu van ((nam mua) or (nam cua)) va tich tinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thu sach)) ky nang xa hoi. hieu van ((nam mua) OR (nam cua)) va tich tinh cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thu sach)) ky nang xa hoi. hieu van ((nam mua) or (nam cua)) va tich tinh cua tre*.