Perhaps you should try some spelling variations:
nang chat » nang phat, nang cham, nang cao
thu sach » tu sach, thuat sach, thuoc sach
thuc day » thuc dan, thuc vat
va thieu » va thiet, va hieu, va tieu
chat hoc » chat hoa, chat thom, cho hoc
ve cham » va cham, ve chat, ve chim
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hanh va » hang va, hanh vi
vu cham » va cham, vu kham, tu cham
tuc va » thuc va, truc va, tuc xa
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang chat hoc. hieu ((ve cham) OR (vu cham)) ((tuc va) or (thuc day)) hanh va va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang chat hoc. hieu ((ve cham) OR (vu cham)) ((tuc va) OR (thuc day)) hanh va va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang chat hoc. hieu ((ve cham) OR (vu cham)) ((tuc va) or (thuc day)) hanh va va thieu".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang chat hoc. hieu ((ve cham) OR (vu cham)) ((tuc va) or (thuc day)) hanh va va thieu*.