Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hoc thieu » toc thieu, hoc hien
tinh sang » tinh quang, tinh trang, tinh son
trinh san » trinh han, trinh quan, trinh toan
cua nhung » va nhung
cong tac » cong ty
cong tan » cong san, cong thanh, cong ty
toan cau » toan cao, toan ban, toan tap

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

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