Perhaps you should try some spelling variations:
tu cach » tu cac
su sach » so sach, vu sach
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu va, hieu van
cau tuc » cau truc, cau tu, cau luc
xa tinh » va tinh, ha tinh, ca tinh
tinh di » tinh doi, trinh di, tinh da
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) tu nang x ho. ((hieu ve) or (hieu qua)) cau tuc xa tinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) tu nang x ho. ((hieu ve) OR (hieu qua)) cau tuc xa tinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) tu nang x ho. ((hieu ve) or (hieu qua)) cau tuc xa tinh di cua tre*.