Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
dong toan » dung toan, bong toan, cong toan
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
toan cao » toan ban, toan tap

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 tach - hanh trinh ((cua dung) or (qua dung)) cong dong toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - hanh trinh ((cua dung) OR (qua dung)) cong dong toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hanh trinh ((cua dung) or (qua dung)) cong dong toan cao*.