Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cam thuc » am thuc, nam thuc, cam thu
thuc dan » thuc hanh, hoc dan, thuc vat
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
hang di » hang doi, hang dien, hang dich
hang vi » hang va, khang voi, hang tai
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu ve cam thuc dan ((hang di) or (((hang vi) OR (hanh vi)))) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve cam thuc dan ((hang di) OR (((hang vi) OR (hanh vi)))) cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ve cam thuc dan ((hang di) or (((hang vi) OR (hanh vi)))) cua viet*".