Perhaps you should try some spelling variations:
chong thien » chon chien, cong chien, hong tien
quen vang » quan van, que van, que lang
thi quen » thoi quen, thi quan, thi huyen
hoc dung » hoc ung, hoc dan, tac dung
thuoc ma » hoc ma, duoc ma
thien ke » thiet ke
boi dong » boi duong, hoi dong, bi dong
dong hoc » dong co, dong luc
hoc mot » hoc moi
ke van » ket van, le van, ke va
phung » phuong, nhung, chung

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( phung thi quen vang. hoc dung thuoc ma ) or ( chong thien ke van. boi dong hoc mot ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( phung thi quen vang. hoc dung thuoc ma ) OR ( chong thien ke van. boi dong hoc mot )).
• Adding a wildcard symbol may retrieve word variants: (( phung thi quen vang. hoc dung thuoc ma ) or ( chong thien ke van. boi dong hoc mot ))*.