Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
truong va » truong dai, truong cao, truong dao
trong ca » trong cac, trong nha
van tay » van tai, van tan, van tam
tay cao » tao cao, tay co, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh ((trong ca) or (truong va)) ((nhung cong) or (thong cong)) van tay cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh ((trong ca) OR (truong va)) ((nhung cong) OR (thong cong)) van tay cao.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((trong ca) or (truong va)) ((nhung cong) or (thong cong)) van tay cao*.