Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cao » chan cho, chat cao, chay cao
manh va » anh va, minh va, manh ba
lanh va » anh va, lanh dao, doanh va
hanh va » hang va, hanh vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - lanh ((((manh va) or (lanh va))) or (hanh va)) thong cong dan chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - lanh ((((manh va) OR (lanh va))) OR (hanh va)) thong cong dan chan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - lanh ((((manh va) or (lanh va))) or (hanh va)) thong cong dan chan cao*.