Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
hieu va » lieu va, hieu qua
hanh de » hanh kem
hanh ve » hanh vi, hanh va, hanh kem
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
va cau » van cau, va cac, va dau
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 dang ha hoi. hieu va cau truc van ((hanh de) or (hanh ve)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ha hoi. hieu va cau truc van ((hanh de) OR (hanh ve)) va thiet.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ha hoi. hieu va cau truc van ((hanh de) or (hanh ve)) va thiet*.