Perhaps you should try some spelling variations:
dang hoa » dang hoai, dang khoa, dong hoa
phat duc » pham duc, phan duc, phan duoc
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
su sac » su sach, su cac
su xac » pu xac, su cac
vi cuu » vi luu, vinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky dang hoa hoc. hieu va phat duc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky dang hoa hoc. hieu va phat duc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky dang hoa hoc. hieu va phat duc va hanh vi cuu tre*.