Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
phat duy » pham duy, phat huy, phan duy
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
ky dang » ky nang, ky danh
va hanh » va thanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tay lang) or (ky dang)) ha hoi. lieu va phat duy ((va hanh) or (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tay lang) OR (ky dang)) ha hoi. lieu va phat duy ((va hanh) OR (van hanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((tay lang) or (ky dang)) ha hoi. lieu va phat duy ((va hanh) or (van hanh)) vi cua tre*.