Perhaps you should try some spelling variations:
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va

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 ky lang ha noi. hieu ve chat ((xuc va) or (thuc vat)) hanh ((tinh cua) OR (trinh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ha noi. hieu ve chat ((xuc va) OR (thuc vat)) hanh ((tinh cua) OR (trinh cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ha noi. hieu ve chat ((xuc va) or (thuc vat)) hanh ((tinh cua) OR (trinh cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ha noi. hieu ve chat ((xuc va) or (thuc vat)) hanh ((tinh cua) OR (trinh cua)) tre*.