Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
va danh » va dinh, va hanh, dia danh
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cua tuc » cua duc, cua thuoc, luat tuc
ma hai » ta hai, va hai, xa hai
va dan » ca dan, va dao, va dau
cua tu » cua su, cua cu, cua te

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky sang ma hai. hieu van cam xuc ((va danh) or (va dan)) vi ((cua tu) OR (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang ma hai. hieu van cam xuc ((va danh) OR (va dan)) vi ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky sang ma hai. hieu van cam xuc ((va danh) or (va dan)) vi ((cua tu) OR (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: so sach ky sang ma hai. hieu van cam xuc ((va danh) or (va dan)) vi ((cua tu) OR (cua tuc))*.