Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dua tren » dung tren
thu nang » thi nang, thu hang, thu bang
hanh lai » hanh lam, hanh tai, thanh lap
tan hanh » tan thanh, tang hanh, toan hanh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tu sach » su sach, te sach, tu cach
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) thu nang xa hoi. hieu ve cam duc tan hanh lai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) thu nang xa hoi. hieu ve cam duc tan hanh lai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) thu nang xa hoi. hieu ve cam duc tan hanh lai ((dua tren) or (cua te))*.