Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
luan dung » lan dung, luan dong, luan hung
anh tang » anh bang, anh dang, anh nang
cong vat » dong vat, cang vat, cong hat
phan dau » phan tu, hang dau
cong va » dong va, cong ha, cong tac

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 (theo tieu)) xanh - anh tang luan dung ((cong vat) OR (cong va)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo tieu)) xanh - anh tang luan dung ((cong vat) OR (cong va)) phan dau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (theo tieu)) xanh - anh tang luan dung ((cong vat) OR (cong va)) phan dau*".