Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
cao tu » cao thu, co tu, cao su
va dan » ca dan, va dao, va dau
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: vu sach y nang x ho. hieu va cao tu ((va thanh) or (va dan)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x ho. hieu va cao tu ((va thanh) OR (va dan)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x ho. hieu va cao tu ((va thanh) or (va dan)) ki su triet*.