Perhaps you should try some spelling variations:
hoc thieu » toc thieu
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
cong khac » cong khan, cong khanh, cong thuc
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
tra chat » tran chau, tran nhat, hoa chat

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 (hoc hien)) tinh - hanh tang cua nhung ((cong khac) OR (cong tac)) tra chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) tinh - hanh tang cua nhung ((cong khac) OR (cong tac)) tra chat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) tinh - hanh tang cua nhung ((cong khac) OR (cong tac)) tra chat".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) tinh - hanh tang cua nhung ((cong khac) OR (cong tac)) tra chat*.