Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
trinh viet » ninh viet, trinh vat
hoc thieu » toc thieu, hoc hien
trinh han » trinh quan
thong bai » thong tai, nhung bai, thong xay
bai toan » bai tap
toan cau » 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 manh - hanh ((trinh viet) or (trinh han)) thong thong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - hanh ((trinh viet) OR (trinh han)) thong thong bai toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - hanh ((trinh viet) or (trinh han)) thong thong bai toan cau*.