Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, tinh hai
tay lang » tai lang, tay tang, tay quang
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
y lang » o lang, _ lang, yen lang
tuc va » thuc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y lang) or (tay lang)) xa hoi. hieu ve cam ((tuc va) OR (truc va)) tinh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y lang) OR (tay lang)) xa hoi. hieu ve cam ((tuc va) OR (truc va)) tinh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y lang) or (tay lang)) xa hoi. hieu ve cam ((tuc va) OR (truc va)) tinh tai cua tre*".