Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
thi van » thi hanh, thi nang
thi lan » thi hanh, thi nang, thi lien
va danh » va dinh, va dan, va hanh
cam tu » cam thu, nam tu, dam tu
ki su » ky su

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 ky nang x ho. ((thi van) or (thi lan)) cam tu ((va thanh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x ho. ((thi van) OR (thi lan)) cam tu ((va thanh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x ho. ((thi van) or (thi lan)) cam tu ((va thanh) or (va danh)) ki su triet*.