Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dan hanh » dang hanh, dan khanh, dan thanh
hang tai » dung tai
thuc dan » thuc hanh, hoc dan, thuc vat
sach ly » sach y, sach lo, sach ty
te sach » toc sach
va tam » van tam, va tham, va tac
se tam » se lam, su tam
vi su » va su, ve su, ki su

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 ly ((hang tai) OR (hang va)) hai. hieu ((se tam) or (va tam)) thuc dan hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((hang tai) OR (hang va)) hai. hieu ((se tam) OR (va tam)) thuc dan hanh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((hang tai) OR (hang va)) hai. hieu ((se tam) or (va tam)) thuc dan hanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((hang tai) OR (hang va)) hai. hieu ((se tam) or (va tam)) thuc dan hanh vi su triet*.