Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
manh trung » manh tung, thanh trung, manh hung
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
toan tai » toan tap, doanh tai, von tai
toan cao » toan tap
toan ban » van ban

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 tinh - manh trung cua nhung cong tan ((((toan tai) OR (toan cao))) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - manh trung cua nhung cong tan ((((toan tai) or (toan cao))) or (toan ban))*.