Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
va kinh » va tinh, qua kinh
su tien » su kien, tu tieng, dau tien
su hien » su kien, thu hien, nhu hien
cam tu » cam thu, nam tu, dam tu

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