Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
cau tren » cu tren, dau tren, ca tren
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
x hoi » xa hoi, o hoi, x ho

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 (thuat sach)) ty nang x hoi. hieu va pham duc va thanh di ((cau tren) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ty nang x hoi. hieu va pham duc va thanh di ((cau tren) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ty nang x hoi. hieu va pham duc va thanh di ((cau tren) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) ty nang x hoi. hieu va pham duc va thanh di ((cau tren) or (hoa viet))*.