Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
trong van » trong cac
thanh cau » thanh chau, thanh mau, nhanh cau
nhanh cay » nhanh ha, nhanh bac, nhanh va
tung cua » tuong cua, dung cua, tang cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - thanh ((tung cua) or (trung cua)) dung trong van ((thanh cau) or (nhanh cay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((tung cua) OR (trung cua)) dung trong van ((thanh cau) OR (nhanh cay)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((tung cua) or (trung cua)) dung trong van ((thanh cau) or (nhanh cay))*.