Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
truc van » truc va, thuc van, truc ban
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu ve » hieu va, hieu van
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi
ve cau » ke cau, va cau, ve cac
te sac » te cac, te san

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) OR (te sach)) ky lang ha hoi. hieu ve cau truc van ((hanh kem) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang ha hoi. hieu ve cau truc van ((hanh kem) OR (hanh vi)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky lang ha hoi. hieu ve cau truc van ((hanh kem) or (hanh vi)) cua viet".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky lang ha hoi. hieu ve cau truc van ((hanh kem) or (hanh vi)) cua viet*.