Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trinh hoac » trinh hoan, trinh han, trinh toan
khong cong » thong cong, khong cang, chong cong
hoc thieu » toc thieu, hoc hien
trinh hoa » trinh do, trinh han
thanh lap » thanh san, phan lap, thanh hai
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh cac, than 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 - hanh ((trinh hoac) or (trinh hoa)) khong cong dan ((than cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((trinh hoac) OR (trinh hoa)) khong cong dan ((than cap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trinh hoac) or (trinh hoa)) khong cong dan ((than cap) or (thanh lap))*.