Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
han tai » hang tai, nhan tai, van tai
thuc va » thuc vat, thuc dan, thuc day
va cham » va chat, va tham
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
tuc va » truc va, tuc xa, duc va
tai va » thai va, mai va, tri va
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: tu sach ((ky lang) OR (ky tang)) ha hoi. lieu va cham ((tuc va) or (thuc va)) han tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky tang)) ha hoi. lieu va cham ((tuc va) OR (thuc va)) han tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) OR (ky tang)) ha hoi. lieu va cham ((tuc va) or (thuc va)) han tai va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) OR (ky tang)) ha hoi. lieu va cham ((tuc va) or (thuc va)) han tai va thiet*.