Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
te sach » toc sach
tu nang » tu nong, tu nano, tu lang
hieu va » lieu va, hieu qua
vuc van » luc van, thuc van, chuc van
duc van » duc va, duc tan, duc manh
tuan vi » quan vi, luan vi, quans vi
va cam » va cham, va cac, va cao
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tu nang) or (tru nang)) xa hoi. hieu va cam ((vuc van) or (duc van)) tuan vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tru nang)) xa hoi. hieu va cam ((vuc van) OR (duc van)) tuan vi luu tru.
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tru nang)) xa hoi. hieu va cam ((vuc van) or (duc van)) tuan vi luu tru*.