Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
dieu tinh » diep tinh, lieu tinh, dien tinh
hoc dieu » hoc thieu, hoc hien
trang va » tran van, hang va
van tuan » van quan, van ban, anh tuan
bai toan » bai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu tinh - hanh trang va nhung cong ((van tuan) or (bai toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu tinh - hanh trang va nhung cong ((van tuan) OR (bai toan)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc dieu tinh - hanh trang va nhung cong ((van tuan) or (bai toan)) ban*.