Perhaps you should try some spelling variations:
thien van » thi van
hanh tai » thanh tai, hang tai, han tai
cuc tieu » muc tieu, cac tieu, cach tieu
mang xa » lang xa, mang may, dang xay
sach ky » sach y, sach ty, sach kem
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) or (sac ky)) ((mang xa) or (nang x)) hoi. thien van cam duc va hanh tai cuc tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sac ky)) ((mang xa) OR (nang x)) hoi. thien van cam duc va hanh tai cuc tieu.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) or (sac ky)) ((mang xa) or (nang x)) hoi. thien van cam duc va hanh tai cuc tieu*.