Perhaps you should try some spelling variations:
quan trong » gian trong
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cua trong » cua truong, cua trung, qua trong
cong tac » cong ty
toan tap » toan ban
han tap » han tai, nhan tai, nhan tao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh tang ((cua trong) OR (quan trong)) cong tac ((han tap) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tang ((cua trong) or (quan trong)) cong tac ((han tap) or (toan tap))*.