Perhaps you should try some spelling variations:
chau phu » chau phi, chau au, chau tho
sach tay » xach tay, sach hay, sach nay
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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 ((lang xa) or (lang ha)) hoi. hieu ve ((chau phu) or (cau truc)) va dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tay ((lang xa) OR (lang ha)) hoi. hieu ve ((chau phu) OR (cau truc)) va dan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach tay ((lang xa) or (lang ha)) hoi. hieu ve ((chau phu) or (cau truc)) va dan vi cua tre*.