Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, hanh mang, hanh tung
cua trong » cua truong, cua trung, qua trong
anh tang » anh bang, anh dang, anh nang
cong tan » cong tac, cong san, cong thanh
chan cao » chan cho, chay cao, toan cao
chat cao » chat co, chat cho, chat bao

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