Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
viec dat » vien dai, vien da, viec lam
te sach » toc sach
viec da » vien da, viec va, viec ha
lang ha » long ha
y lang » o lang, _ lang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
dau vi » dau ve, dat vi, dau viet
dau va » dau ve, lau va

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 ha hoi. hieu ((viec da) OR (viec dat)) thuc vat ((dau vi) or (dau va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang ha hoi. hieu ((viec da) OR (viec dat)) thuc vat ((dau vi) OR (dau va)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang ha hoi. hieu ((viec da) OR (viec dat)) thuc vat ((dau vi) or (dau va)) cua triet*".