Perhaps you should try some spelling variations:
doanh chien » doan thien, hoach chien, khanh chien
chien cua » khien cua, hien cua, chien cuoc
toc sach » hoc sach, doc sach, thuoc sach
va doanh » van doanh, vay doanh, va danh
tai khoi » tai khoa, mai khoi, tao khoi
cham duc » pham duc, cham soc, pham duy
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
dieu vu » dien vu, dieu va, dieu cua
tai hoi » dai hoi, tai hai, tai hoe
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang ((tai hoi) or (tai khoi)). ((dieu vu) or (hieu va)) cham duc va doanh chien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang ((tai hoi) OR (tai khoi)). ((dieu vu) OR (hieu va)) cham duc va doanh chien cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach v nang ((tai hoi) or (tai khoi)). ((dieu vu) or (hieu va)) cham duc va doanh chien cua tre*.