Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
va trien » va truyen, va thiet, va tuyen
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc van » duc va, duc manh, duc phan
minh su » hinh su, dinh su, tinh su
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho
su va » su van, tu va

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)) y nang x hoi. hieu va pham ((duc van) or (duc tan)) minh su va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang x hoi. hieu va pham ((duc van) OR (duc tan)) minh su va trien.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) y nang x hoi. hieu va pham ((duc van) or (duc tan)) minh su va trien*.