Perhaps you should try some spelling variations:
va triet » va trien, ve triet, cua triet
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
va hanh » van hanh, va danh, ban hanh
sach ly » sach y, sach lo, sach ty
cam loc » cam lo
van cam » van nam, van lam, van cau
ly nang » ky nang, ly hang, ly vang
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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 ly nang x hoi. hieu van cam loc ((va hanh) or (va thanh)) sua ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu van cam loc ((va hanh) OR (va thanh)) sua ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang x hoi. hieu van cam loc ((va hanh) or (va thanh)) sua ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu van cam loc ((va hanh) or (va thanh)) sua ((va triet) OR (va thiet))*.