Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
nang doc » nang luc
duoc va » nuoc va, duc va, duoc ma
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
doc hoi » duoc hoi, hoc hoi, doc hai
cua chu » sua chua
ve tao » ve bao, de tao, ve tac
cua cu » cua cau, cua su, cua co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach y) or (sach thu)) nang doc hoi. hieu ve tao duoc va hanh va ((cua cu) OR (cua chu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach y) OR (sach thu)) nang doc hoi. hieu ve tao duoc va hanh va ((cua cu) OR (cua chu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach y) or (sach thu)) nang doc hoi. hieu ve tao duoc va hanh va ((cua cu) OR (cua chu))".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach y) or (sach thu)) nang doc hoi. hieu ve tao duoc va hanh va ((cua cu) OR (cua chu))*.