Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
van cam » van nam, van lam, van cau
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 ((ty nang) or (ty hang)) x ho. hieu van cam tu ((va thanh) or (va hanh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) x ho. hieu van cam tu ((va thanh) OR (va hanh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty hang)) x ho. hieu van cam tu ((va thanh) or (va hanh)) ki su triet*.