Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve nam » va nam, le nam, te nam
he nam » ha nam, nghe nam
vu van » tu van
vu va » tu va, su va

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 ky nang x ho. hieu ((ve nam) OR (he nam)) thuc dan hanh ((vu va) or (vu van)) truyen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang x ho. hieu ((ve nam) OR (he nam)) thuc dan hanh ((vu va) OR (vu van)) truyen.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang x ho. hieu ((ve nam) OR (he nam)) thuc dan hanh ((vu va) or (vu van)) truyen".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x ho. hieu ((ve nam) OR (he nam)) thuc dan hanh ((vu va) or (vu van)) truyen*.