Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh nang » ganh nang, hanh mang, hanh trang
anh nang » ganh nang, anh bang, anh dang
va trong » va truong, va thong, va tuong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban
doi chi » doi khi

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 (doi chi)) xanh - ((hanh nang) or (anh nang)) va trong cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chi)) xanh - ((hanh nang) OR (anh nang)) va trong cong tap toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) xanh - ((hanh nang) or (anh nang)) va trong cong tap toan ban*.