Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
hanh dao » lanh dao, thanh dat, thanh dam
va tuan » van tuan, va quan, va toan
tuan ho » tuan pho, toan ho, xuan ho
thuc va » thuc vat, thuc dan, thuc day
dao cua » dai cua, day cua, dan cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ly » sac ky
tuc va » truc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ly va tuan ho. hieu van chat ((tuc va) or (thuc va)) hanh dao cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ly va tuan ho. hieu van chat ((tuc va) OR (thuc va)) hanh dao cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ly va tuan ho. hieu van chat ((tuc va) or (thuc va)) hanh dao cua tre*.