Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
truong cao » truong dai
cong duong » cuong duong, cong dong, con duong
hoc thieu » toc thieu, hoc hien
duong tai » dung tai, luong tai, dong tai
tung cua » trung cua, tuong cua, dung cua
tran tan » tran tuan, tran thanh, trang tuan
tran van » luan van

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 (truong cao)) cong duong tai ((tran tan) or (tran van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((tung cua) OR (truong cao)) cong duong tai ((tran tan) OR (tran van)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((tung cua) or (truong cao)) cong duong tai ((tran tan) or (tran van))*.