Perhaps you should try some spelling variations:
lang dai » lang hai, lang mai, lang chai
tang dai » tang tai, tang dan, tang da
vu cham » va cham, vu kham, tu cham
vu chao » vu cao, vu chat, vu cho
vi cua » vai cua, di cua
dan vi » doan vi, don vi, dan va
va dan » ca dan, va dao, va dau
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((tang dai) or (lang dai)) hoi. hieu ((vu chao) or (vu cham)) tu va dan vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((tang dai) OR (lang dai)) hoi. hieu ((vu chao) OR (vu cham)) tu va dan vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((tang dai) or (lang dai)) hoi. hieu ((vu chao) or (vu cham)) tu va dan vi cua tu*.