Perhaps you should try some spelling variations:
trinh cua » tinh cua, trinh luat, trinh quan
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
van cam » van nam, van lam, van cau
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky lang) or (ky dang)) xa hoi. hieu van cam xuc ((va hanh) OR (va thanh)) trinh cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky lang) OR (ky dang)) xa hoi. hieu van cam xuc ((va hanh) OR (va thanh)) trinh cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky lang) or (ky dang)) xa hoi. hieu van cam xuc ((va hanh) OR (va thanh)) trinh cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky lang) or (ky dang)) xa hoi. hieu van cam xuc ((va hanh) OR (va thanh)) trinh cua te*.