Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
van lam » van nam
van cau » van dau, van hau, van chat
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
chu tre » cho tre, chu tri, cuu tre
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa
va chu » va che, va cau, va chi

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 ma hoi. thi ((van cau) or (van lam)) ((xuc va) or (thuc dan)) hanh va chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ma hoi. thi ((van cau) OR (van lam)) ((xuc va) OR (thuc dan)) hanh va chu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ma hoi. thi ((van cau) or (van lam)) ((xuc va) or (thuc dan)) hanh va chu tre*.