Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
van lam » van nam
tuc van » thuc van, truc van, tuc va
y lang » _ lang, tay lang, yen lang
o lang » hoa lang, hoi lang
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: te sach ((y lang) OR (o lang)) xa hoi. hieu van lam ((tuc van) or (thuc dan)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (o lang)) xa hoi. hieu van lam ((tuc van) OR (thuc dan)) hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) OR (o lang)) xa hoi. hieu van lam ((tuc van) or (thuc dan)) hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) OR (o lang)) xa hoi. hieu van lam ((tuc van) or (thuc dan)) hanh vi cua tu*.