Perhaps you should try some spelling variations:
trinh di » trinh do, trinh dien, trinh dinh
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, te sach, tu cach
cau tuc » cau truc, cau tu, cau luc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tu nang » tru nang, tu nong, tu nano
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
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) or (su sach)) tu nang x hoi. ((hieu ve) or (hieu qua)) cau tuc va trinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tu nang x hoi. ((hieu ve) OR (hieu qua)) cau tuc va trinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) tu nang x hoi. ((hieu ve) or (hieu qua)) cau tuc va trinh di cua tre*.