Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
va thanh » gia thanh, ban thanh, va tinh
nang hoa » nang hoat, hang hoa, nang hoc
cau theo » cau thi
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
hoa hoi » khoa hoi, hoa hoc, hoa doi

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 hoa hoi. hieu va cac xuc ((van hanh) or (va thanh)) hai ((cau theo) or (cau tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang hoa hoi. hieu va cac xuc ((van hanh) OR (va thanh)) hai ((cau theo) OR (cau tao)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang hoa hoi. hieu va cac xuc ((van hanh) or (va thanh)) hai ((cau theo) or (cau tao))*.