Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay nang » tay nung, may nang, day nang
dau tren » dau tien, dat tren, dau tieng
vu sach » vu bach, su sach, vu khach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
dau lai » dao lai, dat lai, dau hai
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tay nang cao hoi. hieu ve cam ((xuc va) or (duc va)) dau lai ((cua tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tay nang cao hoi. hieu ve cam ((xuc va) OR (duc va)) dau lai ((cua tre) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: vu sach tay nang cao hoi. hieu ve cam ((xuc va) or (duc va)) dau lai ((cua tre) or (dau tren))*.