Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc van » thuc vat, thuc dan, thuc hanh
lang ha » long ha
thuc va » thuc vat, thuc dan, thuc day
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 o lang ha hoi. hieu ((te tai) or (va cac)) ((thuc van) or (thuc va)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach o lang ha hoi. hieu ((te tai) OR (va cac)) ((thuc van) OR (thuc va)) hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: thu sach o lang ha hoi. hieu ((te tai) or (va cac)) ((thuc van) or (thuc va)) hanh vi cua tu*.