Perhaps you should try some spelling variations:
hoc thieu » hoc hien
hanh sinh » hanh tinh, hanh dinh, hinh sinh
dung cong » dung trong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
sinh van » sinh vat, dinh van, sinh va
van dung » van dong, xay dung, tin dung
than cap » khan cap, thanh lap, thanh cac

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) or (toc thieu)) tinh - hanh sinh van dung cong sang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) tinh - hanh sinh van dung cong sang than cap*.