Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
chat duc » chat xuc, chat doc, chet duoc
thai cua » than cua, tai cuc, tri cua
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
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 ty) OR (sach thu)) nang xa hoi. hieu ve chat duc ((va tinh) or (may tinh)) thai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang xa hoi. hieu ve chat duc ((va tinh) OR (may tinh)) thai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) nang xa hoi. hieu ve chat duc ((va tinh) or (may tinh)) thai cua tu".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) nang xa hoi. hieu ve chat duc ((va tinh) or (may tinh)) thai cua tu*.