Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
hanh va » hang va, hanh vi
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, ve cac
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. hieu ve cau truc van ((hanh de) or (hanh va)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu ve cau truc van ((hanh de) OR (hanh va)) va thiet.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu ve cau truc van ((hanh de) or (hanh va)) va thiet*.