Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh sinh » hanh tinh, hanh dinh, hinh sinh
hang ngon » hang nguon, bang ngon, hoang ngoc
thanh van » thanh san, thanh toan, thanh phan
doc hieu » toc thieu, hoc hien
ngon dan » ngot dan, nguong dan, nguoi dan
toan ban » van ban
sinh va » sinh vat, tinh va, dinh van
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) xanh - hanh sinh va hang ngon dan ((toan ban) or (thanh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - hanh sinh va hang ngon dan ((toan ban) OR (thanh van)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - hanh sinh va hang ngon dan ((toan ban) or (thanh van))*.